minigbm: gralloc0: Fix coding style error

minigbm: gralloc0: Fix coding style error

There is a missing whitespace error in gralloc0.cc, which is
automatically corrected by some git hook, so let's fix it finally. Since
the original style issue seems to be caused by a bug in clang-format
used in ChromeOS chroot (and corrected by any other, not broken,
clang-format), just annotate the line to have clang-format bypassed.

BUG=none
TEST=compile

Change-Id: I6df1963eedc3b908d4a0abaffb2db9081eaba043
Reviewed-on: https://chromium-review.googlesource.com/597330
Commit-Ready: Tomasz Figa <tfiga@chromium.org>
Tested-by: Tomasz Figa <tfiga@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>