Improve .rsrc section merging with better handling of the alignment adjustments
made between merged .rsrc sections.

	* peXXigen.c (rsrc_align): New function.  Attempts to cope with
	alignment variances when .rsrc sections are merged.
	(rsrc_process_section): Use rsrc_align.

	* Makefile.am (default-manifest.o): Use WINDRES_FOR_TARGET.
	* Makefile.in: Regenerate.
	* emultempl/default-manifest.rc: Fix typo.
	* scripttempl/pe.sc (R_RSRC): Fix default-manifest exclusion.
	(.rsrc): Add SUBALIGN(4).
	* scripttempl/pep.sc: Likewise.
Fix RX gas testsuite failures by accounting for new variations in the disassembler's output.

	* rx-decode.opc (bwl): Allow for bogus instructions with a size
	field of 3.
	(sbwl, ubwl, SCALE): Likewise.
	* rx-decode.c: Regenerate.

	* gas/rx/mov.d: Update expected disassembly.
Fix typo in changelog entry.