[TestGdbRemoteAbort] Skip on API 16 Android devices

Summary:
This change also adds the infrastructure required to specify the API
levels for which tests should be skipped.

Reviewers: chying, labath

Reviewed By: labath

Subscribers: tberghammer, lldb-commits

Differential Revision: http://reviews.llvm.org/D10282

llvm-svn: 239183