ART: Add a test checking TLS offsets and entrypoints

Add a test (runtime for now, as compile-time checks seem not
possible with current infrastructure) that checks the structure
of the thread tls and entrypoint structs. A failure of the test
indicates a structural change, which hints at a necessary oat
version bump.

Change-Id: I500b5cd940c916ebfc1580e9dd2c287c4d263956
diff --git a/build/Android.gtest.mk b/build/Android.gtest.mk
index 314d672..b07e4f8 100644
--- a/build/Android.gtest.mk
+++ b/build/Android.gtest.mk
@@ -36,6 +36,7 @@
 	runtime/dex_instruction_visitor_test.cc \
 	runtime/dex_method_iterator_test.cc \
 	runtime/entrypoints/math_entrypoints_test.cc \
+	runtime/entrypoints_order_test.cc \
 	runtime/exception_test.cc \
 	runtime/gc/accounting/space_bitmap_test.cc \
 	runtime/gc/heap_test.cc \