支持互斥锁强壮性标志，添加加解锁函数对robust链表的处理

Change-Id: Idef4e0de44d7fac0a7ef293ebb570d7641623e27

Merge pull request !48 from Caoruihong/assert

musl c is not ready for replacement of toolchain's libc, we comment
out some conflict functions temporary.
Signed-off-by: NCaoruihong <crh.cao@huawei.com>
Change-Id: Ifd5e7aa39fd18db5b8c68f24791e9dcb706e257d

Merge pull request !46 from Caoruihong/liteos_m_build_gn

add BUILD.gn for liteos_m kernel portings.
add new posix api: htonl, htons, ntohl, ntohs
Signed-off-by: NCaoruihong <crh.cao@huawei.com>
Change-Id: I3581032659bdc68e98a9470050549faf9f8cbcbb

Merge pull request !45 from x_xiny/master

【背景】
 arm none eabi编译器适配

【修改方案】
 增加编译宏

 re #I3WVXZ
Signed-off-by: Nx_xiny <1301913191@qq.com>

 Change-Id: I834395ba5aeb0a4caeb642ac2fbf4553c30ac3f0

 Change-Id: Ifffd2b7fb3319e8b4a243acdc973e1a36a357e5d

Change-Id: Iefdfdeb5c42c623289185725c2c7e5d64da1159c

Merge pull request !43 from zhangfanfan2/master

Merge pull request !43 from zhangfanfan2/master

由于srand设置时间种子时未使用入参，导致时间种子设置失败，
引发rand生成随机端口固定

close: #I3V8WS
Signed-off-by: Nzff <zhangfanfan2@huawei.com>
Change-Id: Idabed287fa7584ae9c6f2cc966afa35032e24a70

Merge pull request !41 from Caoruihong/porting2

isolate changes, keep orignal musl sources clean.
Signed-off-by: NCaoruihong <crh.cao@huawei.com>
Change-Id: Id7f3a5109771f93d397e30febba36e09ddaf4f36

Merge pull request !38 from JING/link

Merge pull request !35 from lnlan/fixed_pthread

Merge pull request !39 from Caoruihong/master

it will compile fail if vfs is turned off, we fixed it.
Signed-off-by: NCaoruihong <crh.cao@huawei.com>
Change-Id: If2de8c814541e39d491ea6189720aeb05a19e2e9

【背景】
sigaction参数sa_mask的设置方法不符合设置本意，某种情况下会导致进程屏蔽字被覆盖
【修改方案】
修改设置方法，在handle处理前设置屏蔽字，处理后恢复屏蔽字

【影响】
如果用户在handle中设置了屏蔽字，该屏蔽字会在handle结束时会被覆盖掉。已测试了所有
相关用例，均可通过。待在linux验证确认是问题后修复。

re #I3QQA9
Signed-off-by: Nlnlanc <lanleinan@163.com>

Change-Id: Ibc55b1c8720463c8ff68c22fbcb376d8d15bc1e4

close #I3Q0OD

Change-Id: I54f538e265619690889c424488993f1aefaa27ee
Signed-off-by: Nchenjing <chenjing139@huawei.com>

Merge pull request !31 from Zhaotianyu/0522copyright

Merge pull request !31 from Zhaotianyu/0522copyright

close: #I3SHRX

Change-Id: I57f0d03d7e2db88c05cbb983c84e8a26b5308d4d

Merge pull request !25 from guweijie/master

Change-Id: I8224c82a2fb34b0ab6e5b9b100f7de860f95cafe

Merge pull request !19 from MGY917/master

Change-Id: I552790d99c070f045c9300d71c1c69ed5de3ce7b

Merge pull request !18 from Caoruihong/menuconfig

Merge pull request !17 from Caoruihong/master

Change-Id: Ifc6387a541dc5a8a246b1fc5959371c4f9e8749b

Change-Id: Idf1dcd394f3aeef11e4e077fe8f8978565ec16b5

Merge pull request !7 from MGY917/master

Merge pull request !14 from Zhaotianyu/0406limits

Change-Id: I388c76eb10f884dc3608c39ffa29d7f7431b1bc0

Merge pull request !15 from 马明帅/add_issus_pr_template_for_master

Merge pull request !11 from give-me-five/master

Change-Id: Iacf0cc5918e3aad5def71aedbd048bd5d21ccca5

Change-Id: I4666408ee06717e0b8897515f5d2ab01a62891ca

Merge pull request !5 from JING/chenjing_20210108161414

Reviewed-by: shenwei