scripts: Update the gcc-wrapper white list for 4.13.rc3 release

Update the white list of warnings for the latest kernel
release 4.13-rc3, which are being treated as errors while
compiling Kernel with clang compiler.

Change-Id: Id4eee4620de8af47c14f09e8392150509ee8856e
Signed-off-by: Runmin Wang <runminw@codeaurora.org>