[Merge] unity:include-fixes into unity:master

[Marco Trevisan (Treviño)]

The proposal to merge unity:include-fixes into unity:master has been updated.

Commit message changed to:

Add missing includes for build w/o pch

For more details, see:
https://code.launchpad.net/~unity-team/unity/+git/unity/+merge/358294
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Your team Unity Team is requested to review the proposed merge of unity:include-fixes into unity:master.