Don't need builds directory.

Can we build using Win32 (rather than posix) model and not get multiply-defined symbols?

Author: Heesterman, Peter J

supportApp/GraphicsMagickSrc/Magick++/lib/Makefile

@@ -28,7 +28,7 @@ ifeq ($(WITH_GRAPHICSMAGICK),YES)
     endif
     ifeq (mingw, $(findstring mingw, $(T_A)))
       # multiple definition of `_Unwind_Resume on Linux. I don't know how to fix it.
-      USR_LDFLAGS += -Wl,-allow-multiple-definition
+      # USR_LDFLAGS += -Wl,-allow-multiple-definition
     endif
 
     USR_INCLUDES += -I$(TOP)/supportApp/GraphicsMagickSrc