Import cpplint.py and make target cpplint-art

Imported without change from http://google-styleguide.googlecode.com/svn/trunk/cpplint/cpplint.py
Will start making local changes to cpplint.py in followup changes.

Change-Id: I0fda185f4a9f96815739db8f862cf8537402bf3b
diff --git a/Android.mk b/Android.mk
index d4938ff..f871c51 100644
--- a/Android.mk
+++ b/Android.mk
@@ -44,3 +44,8 @@
 .PHONY: test-art-host
 test-art-host: $(foreach file,$(TEST_HOST_SRC_FILES),$(HOST_OUT_EXECUTABLES)/$(notdir $(basename $(file:%.arm=%))))
 	$(foreach file,$(TEST_HOST_SRC_FILES),$(HOST_OUT_EXECUTABLES)/$(notdir $(basename $(file:%.arm=%))) &&) true
+
+# "mm cpplint-art" to style check art source files
+.PHONY: cpplint-art
+cpplint-art:
+	$(LOCAL_PATH)/tools/cpplint.py $(LOCAL_PATH)/src/*.h $(LOCAL_PATH)/src/*.cc