FROMGIT: kbuild: move "_all" target out of $(KBUILD_SRC) conditional

The first "_all" occurrence around line 120 is only visible when
KBUILD_SRC is unset.

If O=... is specified, the working directory is relocated, then the
only second occurrence around line 193 is visible, that is not set
to PHONY.

Move the first one to an always visible place.  This clarifies "_all"
is our default target and it is always set to PHONY.

BUG=chromium:767073
TEST=Time builds, check caches, echo variables before and after

Change-Id: I0eb06af5ba87acb50e7d1bb3ae4367db5ebca7dd
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
(cherry picked from git.kernel.org masahiroy/linux-kbuild kbuild
 commit ba634eceb535d95e87ef09caae7814b3687c6036)
Reviewed-on: https://chromium-review.googlesource.com/713459
Reviewed-by: Simon Glass <sjg@chromium.org>
1 file changed