Initialize blit framebuffer in GL even if not doing msaa

Bug: skia:
Change-Id: I6b7290485e0c3123c62a50ec156738862e9ad18c
Reviewed-on: https://skia-review.googlesource.com/17926
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
1 file changed