rpm: 4.20.0 -> 4.20.1

rpm: 4.20.0 -> 4.20.1

* Rebased:
  0001-When-cross-installing-execute-package-scriptlets-wit.patch
  0016-rpmscript.c-change-logging-level-around-scriptlets-t.patch

* Removed the one which already merged:
  0001-Set-RPM_PLUGINDIR-in-top-level-CMakeLists.txt.patch

* Added a patch to fix rpm-native build error:
  gcc: error: unrecognized command-line option -fhardened
  0001-CMakeLists.txt-Fix-checking-for-CFLAGS.patch

* License-Update: Minor formatting changes as the commit messages said in
  41143b27b6f7320f280aea6014e8f532eb0239d6

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>