Test and fix bug checking status of secondary multidex files.

We were accidentally returning 'false' instead of 'true' to indicate a native
multidex file with an up-to-date primary dex file checksum but out-of-date
secondary dex file checksum is out of date.

Bug: 21022815
(cherry picked from commit a5a1c13a74225a1db3c54dc108fcd161b867bb00)

Change-Id: I0cc56d2d49858a4af91ca8b05aa8bd3c17bb44be
diff --git a/build/Android.gtest.mk b/build/Android.gtest.mk
index 730e61d..5d4f1d3 100644
--- a/build/Android.gtest.mk
+++ b/build/Android.gtest.mk
@@ -30,6 +30,7 @@
   Interfaces \
   Main \
   MultiDex \
+  MultiDexModifiedSecondary \
   MyClass \
   MyClassNatives \
   Nested \
@@ -68,7 +69,7 @@
 ART_GTEST_instrumentation_test_DEX_DEPS := Instrumentation
 ART_GTEST_jni_compiler_test_DEX_DEPS := MyClassNatives
 ART_GTEST_jni_internal_test_DEX_DEPS := AllFields StaticLeafMethods
-ART_GTEST_oat_file_assistant_test_DEX_DEPS := Main MainStripped MultiDex Nested
+ART_GTEST_oat_file_assistant_test_DEX_DEPS := Main MainStripped MultiDex MultiDexModifiedSecondary Nested
 ART_GTEST_oat_file_test_DEX_DEPS := Main MultiDex
 ART_GTEST_object_test_DEX_DEPS := ProtoCompare ProtoCompare2 StaticsFromCode XandY
 ART_GTEST_proxy_test_DEX_DEPS := Interfaces