Log Message:
Updated libgpg-error to 1.23.

Noteworthy changes in version 1.23 (2016-06-15) [C19/A19/R0)
-----------------------------------------------

 * Fixes an assertion failure due to es_flush on read/write streams.

 * Fixes a bug with a too short memory limit is es_fopenmen.

 * Cross-build support for powerpc-unknown-linux-gnuspe and
   tilegx-unknown-linux-gnu architectures.

 * Interface changes relative to the 1.22 release:
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 GPG_ERR_SUBKEYS_EXP_OR_REV       NEW.