This change refactors the GLenum utils into a non-autogenerated and an
autogenerated portion. That makes it easier to modify the non-auto-
generated bits to properly output GLenums even when the gl.xml data
isn't totally correct. For instance, the "GetPName" group was missing
a bunch of queries. Instead of trying to fix the GL we can simply fall
back to querying the "Default" group when we return invalid enum.

Also corrects a missing "0x" on hex output.

Also allows the capture/replay sample to specify the correct binary
data directory when testing a replay.

Bug: angleproject:3611
Change-Id: I8e4c690b2850bb157a8cde8b057b20603e4b177d
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1891008Reviewed-by: Cody Northrop <cnorthrop@google.com>
Commit-Queue: Jamie Madill <jmadill@chromium.org>