Allow different multiplication order in reflect()

GLSL spec allows compiler to assume that multiplication is commutative.
reflect() contains three multiplications which compiler can re-order
based on the spec language. This change relaxes reflect() tests to
allow both evaluation orders.

Bug: 19408572
Change-Id: I78e5b6e6f7bc761b4c49f5e1d4a283fcc60bf512
4 files changed