Move dmtracedump from dalvik to art.

Also ported from C to C++. Note this is more or less a straight port
from C, and the code is still very C-like.

Bug: 24700673
Change-Id: I87db5b799dc1ddd442fdd519abb88fe69fc66773
diff --git a/Android.mk b/Android.mk
index b8ba9f2..fcf70ff 100644
--- a/Android.mk
+++ b/Android.mk
@@ -89,6 +89,7 @@
 include $(art_path)/tools/Android.mk
 include $(art_path)/tools/ahat/Android.mk
 include $(art_path)/tools/dexfuzz/Android.mk
+include $(art_path)/tools/dmtracedump/Android.mk
 include $(art_path)/sigchainlib/Android.mk