描述：sigchain重发信号当SIG_DFL时

Issue：https://gitee.com/openharmony/hiviewdfx_faultloggerd/issues/I6P48B
测试：运行libc-test通过
Signed-off-by: Nzengchunliang <zengchunliang3@huawei.com>

Merge pull request !880 from yinchuang/musl_trace

Merge pull request !883 from zhangdengyu/fixPthread0426

Merge pull request !871 from mwx1087526/up-test-scripts

Merge pull request !882 from Maplestory_zeng/master

Issue:I6YMRJ
Signed-off-by: Nyinchuang <yinchuang@huawei.com>
Test:Build & Boot Device

1、将设置线程detach状态的位置改为操作pthread链表之后，
   消除线程抢占之后执行pthread_join操作直接将线程从内核态删除
   并取消用户态内存映射导致用户态pthread节点未从pthread链表中删除的场景。

Close: #I6JO8B
Signed-off-by: Nzhangdengyu <zhangdengyu2@huawei.com>
Change-Id: I71d01ca0fefe4c036f174a7e63f62097865ec89d

Merge pull request !878 from fangting/master

SetThreadInfoCallback is introduced by dfx_signal_handler which is static linked to libc.
If you want to record some crash-related thread running information when the crash signal arrives.
You can use this mechanism to register callbacks. This callback is called in the signal handler,
so you must handle it with care. You can store additional information in the passed buffer,
which will be displayed in the FatalMessage field of the crash log.
Signed-off-by: NMapleStory <zengzhi5@huawei.com>

Issue:I6XGC4
Signed-off-by: Nfangting <fangting12@huawei.com>

Merge pull request !879 from hongtao/addstartup

Merge pull request !875 from zhangdengyu/muslUpdate0419

add lldb startup debug prop

https://gitee.com/openharmony/startup_init_lite/issues/I6X0LS?from=project-issue

not involving test cases

Change-Id: Ife6888c450dfaa894ff3f4e551c99f32dfa349c4
Signed-off-by: Nhongtao <hongtao11@huawei.com>

Merge pull request !874 from yinchuang/support_same_so

Merge pull request !876 from 刘雅宁/master

Issue:I6WG4X
Signed-off-by: Nyinchuang <yinchuang@huawei.com>
Test:Build && Boot Device

方案描述：
升级socket.c、nscd_query.c至1.2.3

BREAKING CHANGE:
修复测试用例对外变更描述：
1、socket接口v1.2.0中传入错误参数返回EINVAL错误码，更新之后将返回ENOENT错误码；
2、__nscd_query接口v1.2.0中给传入错误参数返回EAFNOSUPPORT错误码，更新之后将返回ENOENT错误码。

Close：#I6WWES
Signed-off-by: Nzhangdengyu <zhangdengyu2@huawei.com>
Change-Id: I877bcca7cae3a98932f2c0f39343f960c555ef76

Add define to differentice between gn and cmake.

https://gitee.com/openharmony/third_party_musl/issues/I6WT07Signed-off-by: Nliuyaning <liuyaning7@huawei.com>

Merge pull request !873 from Zhaotianyu/20230417add_copyright

Issue: #I6UV93

Test: codecheck
Signed-off-by: Narvinzzz <zhaotianyu9@huawei.com>
Change-Id: I0f62d39c6e8cf691f9357d775b70554c6693c61a

Merge pull request !869 from fangting/master

ISSUE:https://gitee.com/openharmony/third_party_musl/issues/I6W97T
Test:All pass
Signed-off-by: Nmaweiye <maweiye@huawei.com>

Merge pull request !866 from hhj/atexit_clear

Merge pull request !759 from yinchuang/add_O2_option

Be consistent with OSTMS

Issue: I6VS78
Signed-off-by: Nfangting <fangting12@huawei.com>

Merge pull request !865 from yinchuang/add_ndk_namesapce_1

Issue:I6UKTB
Signed-off-by: Nyinchuang <yinchuang@huawei.com>
Test:Build & Boot devices

Merge pull request !868 from hhj/runtest_for_linux

Use atexit to register some callback from dso, but there is no
unregister interface. After this dso closed, this callback in
atexit callback chain is invalidate. This workround will save
the dso that the callback come from, then when dso closed, the
relative callbacks would cleared.

Issue： #I6UEZQ
Test：register atexit cb, then dlclose this dso
Signed-off-by: Nhhj <huanghuijin@huawei.com>
Change-Id: I0dfc15366dd51bbe677b9700131fbaf57622499c

Libtest only support run in windows, so here add runtest_linux.sh for linux.

Issue： #I6V6HI
Test：cd third-party/musl/scripts && runtest_linux.sh
Signed-off-by: Nhhj <huanghuijin@huawei.com>
Change-Id: I0c5c78455f0e6d4a9e6e83d6e8f2c7f508e8c980

Merge pull request !862 from Zhaotianyu/20230409backwardcfi

 Issue: #I6U3D6
 Test: cfi demo pass
Signed-off-by: Narvinzzz <zhaotianyu9@huawei.com>
Change-Id: Ia9dbfdf18952b614cfed4a97e6366ee9cb8dedce

Merge pull request !861 from zhangdengyu/supportEDF0404

方案描述：
1、liteos_a调i度框架支持EDF调度算法，默认优先调度EDF策略的任务
2、用户态musl_c库适配新增调度算法，同步修改相关接口以支持用户态创建EDF进程与线程

BREAKING CHANGE:
support EDF对外变更描述：
以下接口支持SCHED_DEADLINE调度策略:
pthread_attr_getschedparam
pthread_attr_setschedparam
pthread_getschedparam
pthread_setschedparam
pthread_create
sched_getscheduler
sched_getparam
sched_setparam
sched_setscheduler

Close：#I6T3P3
Signed-off-by: Nzhangdengyu <zhangdengyu2@huawei.com>
Change-Id: I1ceefc2fdfaecac7a93e5306da629756f9385f84

Merge pull request !855 from fix_libc-test-build-error

Merge pull request !849 from yinchuang/optimize_musl_linker_ram

Issue:I6SL6I
Signed-off-by: Nyinchuang <yinchuang@huawei.com>

Merge pull request !829 from dhy308/release_sigchain_0225

Merge pull request !826 from dhy308/release_tdd_0221

Merge pull request !844 from zhengweiwei/master