bfd/

bfd/
	* coff-rs6000.c (xcoff_ppc_relocate_section): Allow undefined
	symbols to be left unimported when linking statically.
	* xcofflink.c (xcoff_link_add_symbols): Ignore global linkage
	code when linking statically.

ld/testsuite/
	* ld-powerpc/aix-glink-3.s, ld-powerpc/aix-glink-3a.s,
	ld-powerpc/aix-glink-3b.s, ld-powerpc/aix-glink-3.dd,
	ld-powerpc/aix-glink-3-32.d, ld-powerpc/aix-glink-3-64.d: New tests.
	* ld-powerpc/aix52.exp: Run them.  Move the lineno tests to maintain
	alphabetical order.