libbsd: upgrade 0.12.1 -> 0.12.2

libbsd: upgrade 0.12.1 -> 0.12.2

Changelog:
============
-test: nlist: make resilient against -Wl,--gc-sections
-build: Do not rely on internal autoconf ac_cv_sys_file_offset_bits variable
-build: Use -eq instead of = as test operators for arithmetic tests
-build: Fix typo in ABI selection description
-build: Only install time struct conversion macros where missing
-man: Add links for errc module functions
-man: Do not install timeval(3bsd) nor timespec(3bsd)
-strtonum: Do not abort on EINVAL from strtoi()
-closefrom: Ignore files starting with dot when scanning /proc/self/fd
-build: Match also gnu* for GNU/Hurd on the glibc ABI selection

Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>