Force classic locale when parsing floats in skslc.

atof is locale dependent, which can lead to bugs when a decimal separator is something other than a dot.

BUG=skia:

Change-Id: I6f161d686ddea86ce9968e46b632bc79a99ef656
Reviewed-on: https://skia-review.googlesource.com/6532
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
1 file changed