Log Message:
Updated libgpg-error to 1.25.

Noteworthy changes in version 1.25 (2016-11-14) [C20/A20/R0]
-----------------------------------------------

 * New interface gpgrt_get_syscall_clamp to allow libaries to make use
   of Libgpg-error's system call wrapper functions.

 * gpgrt_poll does now work under Windows.

 * Fixed bug in the locking code when used with the nPth threading
   library.

 * Added support for {i686,x86_64}-apple-darwin.

 * Added new error codes.

 * Interface changes relative to the 1.23 release:
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 gpgrt_get_syscall_clamp          NEW.
 GPG_ERR_ENGINE_TOO_OLD	          NEW.
 GPG_ERR_WINDOW_TOO_SMALL         NEW.
 GPG_ERR_WINDOW_TOO_LARGE         NEW.
 GPG_ERR_MISSING_ENVVAR	          NEW.
 GPG_ERR_USER_ID_EXISTS           NEW.
 GPG_ERR_NAME_EXISTS              NEW.
 GPG_ERR_DUP_NAME                 NEW.
 GPG_ERR_TOO_OLD                  NEW.
 GPG_ERR_TOO_YOUNG                NEW.