toybox源码编译时，默认会进行strip操作，如下步骤：

//third_party/toybox/scripts/make.sh:340:
! do_loudly ${CROSS_COMPILE}${STRIP} "$UNSTRIPPED" -o "$OUTNAME"

因此在打包的Makefile中再进行STRIP操作是冗余的。

close #I43767

Change-Id: I10a9861b682eb8e556b7af7519c9109eef0b3a94
Signed-off-by: NGuangyao Ma <guangyao.ma@outlook.com>

in the liteos_a directory, we used to use `make clean all` command
to build liteos_a kernel for test.
Signed-off-by: NCaoruihong <crh.cao@huawei.com>
Change-Id: I5ca689c1c44052f7de937d7faa9e4d3534d97380

sysroot and arch related cflags are pass by BUILD.gn now.
Signed-off-by: NCaoruihong <crh.cao@huawei.com>
Change-Id: Ia6000dd7ed8a8a37e935ace49d8460a919a16566

【背景】当前liteos_a支持的toybox命令与linux存在差别，需要特别实现，为
避免侵入式修改，采用porting的方式将修改分离。

【修改方案】
在third_party/toybox下新增porting目录，以达到分离修改的目的。本次修改
基于porting目录且只涉及liteos目前支持的命令文件。

re #I3UQCK
Signed-off-by: yansira <yansira@hotmail.com>
Change-Id: I15d5835e25d5b5de6e0a6f888c87264c2f886cdf

Change-Id: I0a6e6f2962ca6904c858898eb93a5b2f93e85b69

Change-Id: I052d930d54e63179b17b77f02c107a015f3cfc3f

Change-Id: Ia6c1f6302407a707b3ec9b805f4c92d8a7970b86