[LTP] [PATCH v2] newlib_tests/test_exec.c: Fix compiler error before glibc v2.11

[Jan Stancek]

----- Original Message -----
> Before glibc v2.11, execvpe() was not introduced and resulted in
> compiler error, so we replace execvpe() with execve() and update
> test-writing-guidelines.txt.
> 
> Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>

This is older than oldest RHEL distro I still use to check LTP builds,
but it works fine on more recent ones, so ACK.

Regards,
Jan