testsuite XPASSes

testsuite XPASSes

This adjusts the testsuite to get rid of a number of XPASSes that have
appeared.  Someone might like to look into a better patch for the s390
change.

aarch64-pe  XPASS: weak symbols
arm-nacl  XPASS: rgn-over8
mcore-pe  XPASS: ld-scripts/provide-8
mips64-linux-gnuabi64  XPASS: vers4
mips64-linux-gnuabi64  XPASS: vers4b
mips-linux-gnu  XPASS: vers4
mips-linux-gnu  XPASS: vers4b
s390-linux-gnu  XPASS: undefined line
sh4-linux-gnu  XPASS: --gc-sections with __start_SECTIONNAME
sh-coff  XPASS: objcopy object (simple copy)
sh-coff  XPASS: objcopy executable (pr25662)

binutils/
	* testsuite/binutils-all/objcopy.exp: Don't xfail "simple
	copy" and "pr25662" on sh-*-coff.  Remove all non-ELF xfails
	on "ELF unknown section type" test.
ld/
	* testsuite/ld-elfvers/vers.exp (vers4, vers4b): Don't xfail
	all mips, just xfail mips irix.
	* testsuite/ld-gc/pr19161.d: Don't xfail sh.
	* testsuite/ld-scripts/rgn-over8-ok.d: Don't xfail nacl.
	* testsuite/ld-scripts/weak.exp: Don't xfail aarch64-pe.
	* testsuite/ld-undefined/undefined.exp: Conditionally xfail
	"undefined line" depending on gcc version for s390.