versioner: fix makefiles.

Move the Android.mk to src/ so that mm in that directory works.
Also, remove the dependency on FORCE_BUILD_LLVM_COMPONENTS.

Change-Id: Iad7f3fc96f5f26f9535141d752ba865b40d5ff7e
diff --git a/tools/versioner/Android.mk b/tools/versioner/Android.mk
index 4cf30e2..c455f97 100644
--- a/tools/versioner/Android.mk
+++ b/tools/versioner/Android.mk
@@ -1,26 +1,3 @@
-ifeq (true,$(FORCE_BUILD_LLVM_COMPONENTS))
-
 LOCAL_PATH := $(call my-dir)
 
-include $(CLEAR_VARS)
-
-LOCAL_MODULE := versioner
-LOCAL_MODULE_HOST_OS := linux
-
-LOCAL_CLANG := true
-LOCAL_CFLAGS := -Wall -Wextra -Werror -Wno-unused-parameter
-LOCAL_CFLAGS += -D__STDC_CONSTANT_MACROS -D__STDC_LIMIT_MACROS
-LOCAL_CPPFLAGS := $(LOCAL_CFLAGS) -std=c++14 -fno-rtti
-
-LOCAL_SRC_FILES := \
-  src/versioner.cpp \
-  src/Arch.cpp \
-  src/DeclarationDatabase.cpp \
-  src/SymbolDatabase.cpp \
-  src/Utils.cpp
-
-LOCAL_SHARED_LIBRARIES := libclang libLLVM
-
-include $(BUILD_HOST_EXECUTABLE)
-
-endif
+include $(call all-subdir-makefiles)