mark as git version

Rules.mak

@@ -127,7 +127,7 @@ export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS MULTILIB_DIR
 MAJOR_VERSION := 1
 MINOR_VERSION := 0
 SUBLEVEL      := 1
-EXTRAVERSION  :=
+EXTRAVERSION  :=-git
 VERSION       := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
 ABI_VERSION   := $(MAJOR_VERSION)
 ifneq ($(EXTRAVERSION),)