Move -Wlogical-op into xcompile

Clang doesn't know `-Wlogical-op`, so let's move it into xcompile where
we can easily distinguish between the two. However, this requires us to
split out `GCC_ADAFLAGS*` from `GCC_CFLAGS*`.

Change-Id: I6a50de0bc5372f61337f237383d32645ba86b0fd
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33579
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

util/xcompile/xcompile

@@ -225,6 +225,9 @@ SUBARCH_SUPPORTED+=${TSUPP-${TARCH}}
 # GCC
 GCC_CC_${TARCH}:=${GCC}
 GCC_CFLAGS_${TARCH}:=${CFLAGS_GCC}
+# Generally available for GCC's cc1:
+GCC_CFLAGS_${TARCH}+=-Wlogical-op
+GCC_ADAFLAGS_${TARCH}:=${CFLAGS_GCC}
 GCC_COMPILER_RT_${TARCH}:=${CC_RT_GCC}
 GCC_COMPILER_RT_FLAGS_${TARCH}:=${CC_RT_EXTRA_GCC}