gcc-cross.inc: Remove test runner script generation
Remove the generation of the testgcc script which could be used to run
the gcc test suite against a cross compiler with a remote execution
target. The same functionality can now be achieved with the 'do_check'
task of gcc-runtime or with oe-selftest (for automation of execution
against qemu-user/qemu-system targets).
Signed-off-by: Nathan Rossi <nathan@nathanrossi.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
