The GL driver can sometimes have an empty info log and return an info
log length of 0. This would cause a vector to be initialized with a
length of 0 just before it's .data() pointer was used, causing a
segfault.

BUG=angleproject:1323

Change-Id: Iaf9b569ec64a90c714a213562e427fb7cc8daa6b
Reviewed-on: https://chromium-review.googlesource.com/330197Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>