unicore32: Use full path in KBUILD_IMAGE definition

The KBUILD_IMAGE variable is used by the rpm and deb-pkg targets, which
expect it to point to the image file in the build directory. The
builddeb script has a workaround for architectures which only provide
the basename, but let's provide a clean interface for packaging tools.

Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Signed-off-by: Michal Marek <mmarek@suse.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

arch/unicore32/Makefile

@@ -43,9 +43,9 @@ boot			:= arch/unicore32/boot
 
 # Default defconfig and target when executing plain make
 KBUILD_DEFCONFIG	:= $(ARCH)_defconfig
-KBUILD_IMAGE		:= zImage
+KBUILD_IMAGE		:= $(boot)/zImage
 
-all:	$(KBUILD_IMAGE)
+all:	zImage
 
 zImage Image uImage: vmlinux
 	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@