Add hprof. This code builds but is untested.

Change-Id: Ied6549ef903761447fb3d28cf28b8bbc76e5ef35
diff --git a/build/Android.common.mk b/build/Android.common.mk
index 4fb0187..1aebb65 100644
--- a/build/Android.common.mk
+++ b/build/Android.common.mk
@@ -120,6 +120,11 @@
 	src/file_linux.cc \
 	src/heap.cc \
 	src/heap_bitmap.cc \
+	src/hprof/hprof.cc \
+	src/hprof/hprof_class.cc \
+	src/hprof/hprof_heap.cc \
+	src/hprof/hprof_output.cc \
+	src/hprof/hprof_string.cc \
 	src/image.cc \
 	src/image_writer.cc \
 	src/indirect_reference_table.cc \