Bug 970994 - Add NSPR log support for Android mochitests; r=dminor

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extra : rebase_source : 354fdabf202da6ecb6823c4190b79290793a3734
Bug 865006 - Re-order manifest and run a few more xpcshell tests on Android; no review

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extra : rebase_source : 0c43953ffac68f75036bd20183e3307befa449f9