Skip 098-ddmc for GC stress test

And add comment about the temporary fix in 098-ddmc because of behavior
change for DDMS's getRecentAllocations().

Also fixed a buggy typo in Android.run-test.mk.

Bug: 20037135
Change-Id: Ia57e03f458d8570690616d2cc49f2ead42a96cb0
2 files changed