Some flags were sent as parameters while an Options parameter was added.
This change moves those flags to the GlslangSourceOptions struct.

Bug: angleproject:3394
Change-Id: Iff5c1c83dd564d7bcfcbd84e6df244b7356d669d
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1984108Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>