Log Message:
libgpg-error: updated to 1.29

Noteworthy changes in version 1.29:
* The yat2m tool is during cross-compile now also installed on the
  host platform.
* New option parser and associated functions similar to the one used
  by GnuPG.
* New Base-64 encoder.
* Fixes regression in 1.28 for arm64 and w64 builds.
* Interface changes relative to the 1.28 release:
gpgrt_argparse                  New.
gpgrt_usage                     New.
gpgrt_strusage                  New.
gpgrt_set_strusage              New.
gpgrt_set_usage_outfnc          New.
gpgrt_set_fixed_string_mapper   New.
GPGRT_ENABLE_ARGPARSE_MACROS    New macro.
gpgrt_b64enc_start              New.
gpgrt_b64enc_write              New.
gpgrt_b64enc_finish             New.