Fix: "$(srctree) is not clean, please run 'make mrproper" error... & add color
If USES_VMWARE_VIRTUALIZATION = true, then AndroidKernel.mk adds to
KERNEL_OBJ/.config before Makefile runs causing error (Makefile: no config yet)
I could  also just ignore the configs, or put them in a seperate file...
ie. Makefile, below this rule but my builds never run make in srctree dir.