https://chromium-review.googlesource.com/c/1304017 removed str()
wrapping values passed to TInfoSinkBase::operator<<().

This broke ANGLE roll
https://chromium-review.googlesource.com/c/chromium/src/+/1309331
failing compile on linux-libfuzzer-asan-rel bot.

Looks like libfuzzer compiler has a bug, not being able to find
sh::BlockLayoutEncoder::BytesPerComponent.
Wrapping it in str() works around this.

Bug: angleproject:1951
Change-Id: I2deb573667dc1e88d352bad1933c269ec36cf398
Reviewed-on: https://chromium-review.googlesource.com/c/1309975
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>