Add newlines when writing original shader source to shader debug output. Previously, the entire original shader would end up being written to a single line, not very readable. Change-Id: I8cdfd498bb47395da2bd11c3d3b2eecf266c914e Reviewed-on: https://chromium-review.googlesource.com/576064 Reviewed-by: Corentin Wallez <cwallez@chromium.org>