Fixing quoting in find commands of Makefiles and .mk files
Fixing quoting in find commands of Makefiles and .mk files

Also fixing various cases where find was not properly escaped with $(shell)

Refs #1761.

r16947

idaholab/falcon,idaholab/falcon,aeslaughter/falcon,aeslaughter/falcon,aeslaughter/falcon,idaholab/falcon,idaholab/falcon