Adjust normalize.pl for p4est 1.1+.

We have a number of tests that use p4est output functionality, but the
format p4est writes in has changed in recent p4est versions. Delete the
lines that differ in normalize.pl and adjust stored test output files
accordingly.
Merge pull request #266 from bangerth/adjust-tests-for-p4est-1.0+

Adjust normalize.pl for p4est 1.1+.