libgpg-error: Update to version 1.51

libgpg-error: Update to version 1.51

- Update from version 1.50 to 1.51
- Update of rootfile
- Changelog
    1.51
	 * Allow initialization of new Windows threads to utf8 mode.  [T7185]
	 * Add GPGRT_PROCESS_ALLOW_SET_FG for gpgrt_process_spawn.
	   [rEb79d4206f4]
	 * Add new spawn function to modify the environment.  [T7307]
	 * Fix missing environ var for macOS and others.  [T7169,T7307]
	 * Fix forgotten _gpgrt_post_syscall on create pipe failure.  [rEbcab96484d]
	 * Let gpgrt_poll return an error for a closed fd.  [rE4a3dc85f69]
	 * Fix build error introduced by C-committee stupidity.  [T7344]
	 * Interface changes relative to the 1.50 release:
		 _gpg_w32_gettext_use_utf8           EXTN (new value 2).
		 gpgrt_spawn_actions_set_env_rev     NEW.
		 GPGRT_PROCESS_ALLOW_SET_FG          NEW.

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>