add fchdir and testcases

Change-Id: Idb62087ddc46b3b7db4ceaef478d7b9192115628
Signed-off-by: Nwcc0 <917033401@qq.com>

Merge pull request !69 from MGY917/cloexec

Merge pull request !81 from zhuoli72/master

Merge pull request !80 from Zhaotianyu/0731libc_opt

Merge pull request !72 from wcc/fstatfs

!52 fix mutex&pthread mould musl api:pthread_mutexattr_getrobust/pthread_mutexattr_setrobust/pthread_mutex_consistent/pthread_getconcurrency/pthread_setconcurrency
Merge pull request !52 from 王建军/mutex

针对字符串类高频函数：
1. 采用单次多字节操作提升字符串类高频函数的执行效率
2. 针对armv7-a，采用neon指令进行优化

close: #I42DAK

Change-Id: I6d09a549436a1130da71d79274d38be86f156199
Signed-off-by: Narvinzzz <zhaotianyu9@huawei.com>

Signed-off-by: Nzhuoli <pengzhuoli@huawei.com>

加载so的过程中，需要设置O_CLOEXEC，如果不设置，会导致子进程继承父进程打开的所有
so文件句柄。

close #I3U81W
Signed-off-by: NGuangyao Ma <guangyao.ma@outlook.com>
Change-Id: I249dd34c182434fa070dcd180b6931002597a074

Merge pull request !76 from dhy308/master

Signed-off-by: Ndhy308 <tony.gan@huawei.com>

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 !54 from wcc/misc

Merge pull request !47 from guweijie/master

add fstatfs api and unitest
Signed-off-by: Nwcc0 <917033401@qq.com>
Change-Id: I82b988a068d46c875ae9cea366261726566660ef

fix porting

Change-Id: Iec5ed30d8f02095312ced41ac5ae869e8f9521a4

Merge pull request !71 from zhuoli72/master

Merge pull request !70 from weichaox/musl_src

fix porting

Change-Id: Ic1bd1cdcc5db6bc368c7a0860cd9565a21f7f21c

Signed-off-by: Nzhuoli <pengzhuoli@huawei.com>

Signed-off-by: Nweichaox <wangweichao2@huawei.com>
Change-Id: Ie4d0365dda47a9f187d9e5022bec642445a4fd56

Merge pull request !68 from lnlan/add_assert

Merge pull request !66 from Zhaotianyu/0726stdalign

【背景】
补充assert.c
【修改方案】
BUILD.gn中取消对assert.c屏蔽，assert.c中删除__assert和__assert2接口（这两
接口不是musl标准接口）。
【影响】
对现有的产品编译不会有影响。

re #I42HM7
Signed-off-by: Nlnlanc <lanleinan@163.com>
Change-Id: I630761bb2cadb83a15c1de3767a1cda292176fff

Merge pull request !65 from zhuoli72/master

close: #I42FYJ
Signed-off-by: Narvinzzz <zhaotianyu9@huawei.com>
Change-Id: I8365a057f8793ea35b03a0dfd95eae033ea9861a

Merge pull request !60 from wangchen/toybox

Merge pull request !64 from Kiita/toybox_update

【背景】liteos_a toybox 命令升级升级

【修改方案】
1、help命令列表不支持命令删除。
2、cp命令和mv命令拷贝文件失败和文件损坏等问题修复。
3、修复du命令统计nfs文件大小为0问题修复。
4、修复ls命令nfs文件时间打印信息有误问题。
5、更新命令不支持入参列表。

re #I41N2A
Signed-off-by: yansira <yansira@hotmail.com>
Change-Id: Iaa112889739c4e5c36751d82d55be85eaf96ad62

Merge pull request !62 from Caoruihong/build_gn

Signed-off-by: Nzhuoli <pengzhuoli@huawei.com>

Merge pull request !63 from wangchen/mutex_free

1.modifications:
modified:   porting/liteos_a/user/src/mq/mq_notify.c

2.influence:
none
Signed-off-by: Nteamol <28105285@qq.com>

【背景】
解决toybox已支持命令的遗留问题，新增命令功能。

【修改方案】
1. 移植toybox并在原码其他仓进行适配。

【影响】
对现有的产品编译不会有影响。

re #I41N2A
Signed-off-by: Nwangchen <253227059@qq.com>

using gn build system
Signed-off-by: NCaoruihong <crh.cao@huawei.com>
Change-Id: I92d44564b8d0dd9977f841d76b71bcfb43f18d78

【背景】当前L0平台调用fopen时会创建线程锁，fclose中无对应释放的地方。

【修改方案】
在fclose中调用线程锁释放流程

【影响】
对现有的产品编译不会有影响。

re #I41LEO
Signed-off-by: Nwangchen <253227059@qq.com>

Merge pull request !61 from zhuoli72/master

Signed-off-by: Nzhuoli <pengzhuoli@huawei.com>

Merge pull request !58 from zhuoli72/master

Signed-off-by: Nzhuoli <pengzhuoli@huawei.com>