Fix more linker testsuite failures.

bfin	* elf32-bfin.c (bfin_adjust_dynamic_symbol): Fail if a COPY reloc
	is needed.

ld	* testsuite/ld-elf/comm-data.exp: Expect comm-data2 test to fail
	for bfin.
	* testsuite/ld-elf/elf.exp: Expect pr14170 and symbolic function
	tests to fail for bfin.
	* testsuite/ld-elf/endsym.d: Expect to fail with cr16, crx, dlx,
	nds32 and visium.
	* testsuite/ld-elf/var1.d: Expect to fail with d30v, dlx, ft32 and
	microblaze.
	* testsuite/ld-pe/pe.exp: Expect foreign symbol test to fail for
	mcore-pe.