binutils objcopy test tidy

binutils objcopy test tidy

The main aim of this patch is to perform more objcopy tests when we
can build executables but not run them.  ie. non-native with cross
compiler available.

	* binutils-all/objcopy.exp: Delete trailing whitespace.  Use
	"string equal" rather than "string match" when making simple
	string comparisons.  Revert 2008-07-08 host_triplet checks.
	Perform non-run tests when we can build executable.
	(strip_executable, strip_executable_with_saving_a_symbol): Move
	run test later.  Take extra param on whether to perform run test.
	Update callers.
	(keep_debug_symbols_and_test_copy): Delete unused vars.