uru 0.7.6

Closes #34472.

Signed-off-by: Misty De Meo <mistydemeo@gmail.com>
uru: add 0.7.6 bottle.
glog: gflags compatibility fix

Closes #34416. The upstream issue tracker for Glog is pretty dead, and
gflags development seems to be outpacing it considerably, so vendoring
the old version of gflags is a workaround.
glog: add 0.3.3 bottle.