This flag is used when building the Linux kernel with GCC. When the
kernel is built with scan-build (which defaults to GCC for the compiler
step), ccc-analyzer passes along all '-f' flags it sees from the
compiler step, which causes the clang invocation to fail because this
flag is completely unrecognized.
Add this flag to the clang_ignored_gcc_optimization_f_Group so that it
is recognized and does not cause the analyzer step of ccc-analyzer to