Revert "Use a std::stringstream for Program's InfoLog." Missing one character for the log length. BUG=angleproject:307,angleproject:992 This reverts commit 8ae74e11d2105104737a7425e3bdd68e6329dcfa. Change-Id: Ifb3658c324cb0aa56ee31352a0fc0e6759979f7b Reviewed-on: https://chromium-review.googlesource.com/269848 Reviewed-by: Jamie Madill <jmadill@chromium.org> Tested-by: Jamie Madill <jmadill@chromium.org>