[testsuite][1/2] Move ${tool}_check_unsupported_p into separate file

	* lib/target-utils.exp: New file.
	* lib/gcc-defs.exp (${tool}_check_unsupported_p): Delete.
	Include target-utils.exp.
	* lib/objc.exp: Likewise.
	* lib/mike-gcc.exp: Load target-utils.exp.
	* lib/mike-g++.exp: Likewise.
	* lib/go-torture.exp: Likewise.
	* lib/fortran-torture.exp: Likewise.
	* lib/c-torture.exp: Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@218620 138bc75d-0d04-0410-961f-82ee72b054a4