kbuild: fix cc1 options check to ensure we do not use -fPIC when compiling

kbuild: fix cc1 options check to ensure we do not use -fPIC when compiling

The arch/*/boot/Makefile use cc-options to check for GCC command options
and cc-options use the hardened specs when checking for GCC command
options.  When -fPIE is pass to cc1 it can't use -ffreestanding or
-fno-toplevel-reorder.  Then it fail to build stuff with -ffreestanding
and -fno-toplevel-reorder.

Thanks to Fredric Johansson for finding the main problem behind a failed
build using a hardened toolchain.

Signed-off-by: Magnus Granberg <[email protected]>
Signed-off-by: Jory A. Pratt <[email protected]>
Cc: Fredric Johansson <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Cc: <[email protected]>
Signed-off-by: Sam Ravnborg <[email protected]>