Spoof gflags pseudo-package __name__ for backwards compatibility.
The core gflags package is `third_party.py.gflags.gflags`, but many downstream
projects and tools use the pseudo-package `third_party.py.gflags`. gflags raises
DuplicateFlagError when defining default flags from packages with different
names, so this fix adjusts the pseudo-package's __name__ attribute to match that
of the core package.
+# gflags raises DuplicateFlagError when defining default flags from packages
+# with different names, so this pseudo-package must mimic the core gflags
+# package name.
+__name__ += ".gflags" # i.e. "third_party.py.gflags.gflags"
+
from gflags import *
