add TEMP_FAILURE_RETRY macro from utils/Compat.h

Signed-off-by: You-Sheng Yang <vicamo@gmail.com>
add strlcat.c from libc/upstream-openbsd/lib/libc/string

Signed-off-by: You-Sheng Yang <vicamo@gmail.com>
build strlcat.c

Signed-off-by: You-Sheng Yang <vicamo@gmail.com>
bump version for v0.0.4 release

Signed-off-by: You-Sheng Yang <vicamo@gmail.com>