Fixed GLSL header line ordering

Under some circumstances, an extension could be written after a global variable.
This should fix the ordering so that can never happen again.

Bug: b/111582212
Change-Id: Id2f7645253fdc521ba85ca0e6863236baef63a4b
Reviewed-on: https://skia-review.googlesource.com/143102
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
2 files changed