gcc: Oe-selftest failure analysis - fix for vect-simd test failures

gcc: Oe-selftest failure analysis - fix for vect-simd test failures

In gcc vect module, the vect-simd-clone-10.c & vect-simd-clone-12.c tests are failed with below error, due to a bug in testcase:
xgcc: fatal error: cannot specify '-o' with '-c', '-S' or '-E' with multiple files compilation terminated'

Detailed bug info & upstream fix is here:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113899

Upstream Status: Backport [https://gcc.gnu.org/g:948dbc5ee45f9ffd5f41fd6782704081cc7c8c27]

Signed-off-by: Harish Sadineni <Harish.Sadineni@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>