kbuild: create the source symlink earlier in the objdir

It's useful to already have the source symlink in a
objdir when one just runs make *config. Then one
can do

mkdir obj-allyes
cd obj-allyes
make -C ../sourcedir O=$(pwd) allyesconfig
./source/scripts/config --disable debug_info
make CC=icecc -j18

without having to interrupt the make first just to
get the source symlink.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
[sam: deleted the other source symlink statement]
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

Makefile

@@ -389,6 +389,7 @@ PHONY += outputmakefile
 # output directory.
 outputmakefile:
 ifneq ($(KBUILD_SRC),)
+	$(Q)ln -fsn $(srctree) source
 	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
 	    $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
 endif
@@ -946,7 +947,6 @@ ifneq ($(KBUILD_SRC),)
 	    mkdir -p include2;                                          \
 	    ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm;     \
 	fi
-	ln -fsn $(srctree) source
 endif
 
 # prepare2 creates a makefile if using a separate output directory