x86/tools: Fix Makefile to build all test tools

Fix arch/x86/tools/Makefile to compile both test tools
correctly. This bug leads build error.
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: yrl.pp-manager.tt@hitachi.com
Link: http://lkml.kernel.org/r/20111205120533.15475.62047.stgit@cloudSigned-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/tools/Makefile

@@ -25,8 +25,7 @@ posttest: $(obj)/test_get_len vmlinux $(obj)/insn_sanity
 	$(call cmd,posttest)
 	$(call cmd,sanitytest)
 
-hostprogs-y	:= test_get_len
-hostprogs-y	:= insn_sanity
+hostprogs-y	+= test_get_len insn_sanity
 
 # -I needed for generated C source and C source which in the kernel tree.
 HOSTCFLAGS_test_get_len.o := -Wall -I$(objtree)/arch/x86/lib/ -I$(srctree)/arch/x86/include/ -I$(srctree)/arch/x86/lib/ -I$(srctree)/include/