Allow makefiles to be parsed in a trimmed down manifest.

Test: m
Change-Id: Id0e52eacc8e8b5fa75af2050a72be6a8bdadc984
Exempt-From-Owner-Approval: Unbreaks ART team
diff --git a/fs_mgr/libdm/Android.mk b/fs_mgr/libdm/Android.mk
index a701aa2..6aedc25 100644
--- a/fs_mgr/libdm/Android.mk
+++ b/fs_mgr/libdm/Android.mk
@@ -19,4 +19,4 @@
 include $(CLEAR_VARS)
 
 LOCAL_MODULE := VtsKernelLibdmTest
-include test/vts/tools/build/Android.host_config.mk
+-include test/vts/tools/build/Android.host_config.mk
diff --git a/fs_mgr/liblp/Android.mk b/fs_mgr/liblp/Android.mk
index 53a050b..7f7f891 100644
--- a/fs_mgr/liblp/Android.mk
+++ b/fs_mgr/liblp/Android.mk
@@ -19,4 +19,4 @@
 include $(CLEAR_VARS)
 
 LOCAL_MODULE := VtsKernelLiblpTest
-include test/vts/tools/build/Android.host_config.mk
+-include test/vts/tools/build/Android.host_config.mk