Enforce "C" locale when building shaders in Dawn
Enforce "C" locale when building shaders in Dawn

All other backends do this (to avoid floating point numbers with
commas), was just missing here.

Needed for https://skia-review.googlesource.com/c/skia/+/368876

Change-Id: I506dbadf969c3b000b3e90b3f5864c4fe499a884
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/371873
Reviewed-by: John Stiles <f4fcf42d3bb5924557f1eeb3be66747535e585da@google.com>
Commit-Queue: Brian Osman <794c0b5534edf5601d88e1d41975d0262da12894@google.com>

aosp-mirror/platform_external_skia,google/skia,google/skia,aosp-mirror/platform_external_skia,google/skia,google/skia,google/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia,google/skia,aosp-mirror/platform_external_skia,google/skia,google/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia