Log Message:
Updated libgpg-error to 1.22.

Noteworthy changes in version 1.22 (2016-04-25) [C18/A18/R0)
-----------------------------------------------

 * New functions and macros to to provide iconv(3) on Windows.

 * Support for LeakSanitizer with the gpgrt_annotate_leaked_object
   inline function.

 * Interface changes relative to the 1.21 release:
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 GPG_ERR_DB_CORRUPTED             NEW.
 gpgrt_annotate_leaked_object     NEW inline func.
 GPGRT_ENABLE_W32_ICONV_MACROS    NEW.
 gpgrt_w32_iconv_open             NEW.
 gpgrt_w32_iconv_close            NEW.
 gpgrt_w32_iconv                  NEW.