fixup libobjc usage of PCC_BITFIELD_TYPE_MATTERS

libobjc/ChangeLog:

2015-05-01  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>

	* acinclude.m4: Include bitfields.m4.
	* config.h.in: Regenerate.
	* configure: Likewise.
	* configure.ac: Invoke gt_BITFIELD_TYPE_MATTERS.
	* encoding.c: Check HAVE_BITFIELD_TYPE_MATTERS.

config/ChangeLog:

2015-05-01  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>

	* bitfields.m4: New file.

From-SVN: r222715