dpkg: upgrade 1.21.1 -> 1.21.2

dpkg: upgrade 1.21.1 -> 1.21.2

The following patches refreshed for new version:
0001-build.c-ignore-return-of-1-from-tar-cf.patch
0003-Our-pre-postinsts-expect-D-to-be-set-when-running-in.patch
0004-The-lutimes-function-doesn-t-work-properly-for-all-s.patch
0007-dpkg-deb-build.c-Remove-usage-of-clamp-mtime-in-tar.patch
noman.patch
remove-tar-no-timestamp.patch

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