Makefile: fix HAVE_VENDOR_COMMON_LIB

Commit 8b5a02640adf77301f943e8754992c50df004e8a ("Makefile: cosmetic:
optimize usage of LIBS-y") broke the build of boards that have a board
vendor "common" directory, by introducing a space between "LIBS-" and
"y".

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Acked-by: Kim Phillips <kim.phillips@freescale.com>
diff --git a/Makefile b/Makefile
index 5ce5cc3..947f3ff 100644
--- a/Makefile
+++ b/Makefile
@@ -225,7 +225,7 @@
 
 OBJS := $(addprefix $(obj),$(OBJS))
 
-HAVE_VENDOR_COMMON_LIB = $(if $(wildcard board/$(VENDOR)/common/Makefile), y, n)
+HAVE_VENDOR_COMMON_LIB = $(if $(wildcard board/$(VENDOR)/common/Makefile),y,n)
 
 LIBS-y += lib/libgeneric.o
 LIBS-y += lib/lzma/liblzma.o