Bug 912464 - update PSL for .ar. r=gerv.

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extra : rebase_source : ac1d0137c965018ab3ad1637a62a8e185861a00e
Bug 910095 - update .sv and .om in PSL, and relevant test. r=gerv.

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extra : rebase_source : a6866a18f959f15af84640e1efa935b1e16ca415
Bug 910095 - update PSL for .ng. r=gerv. DONTBUILD.

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extra : rebase_source : b17d19f0ccac18f28a44cdb80588af61c3a360b3