Quote the compiler names in hypre and trilinos build scripts

Otherwise compiler commands that contain spaces (e.g. "ccache mpicc") crash
the build scripts in weird ways, even if they are quoted in the configure
options file.
Remove "current" options file and "user_drivers.dir_list" from version control

* Useless but constantly cause clashes when updating svn because everyone
  uses different settings.

* Add code to autogen.sh to copy in the "defaults options if no current options
  exists.

* user_drivers.dir_list is already automatically generated in autogen.sh

* Both files are already in .gitignore, I need someone who uses svn directly to
  do the equivalent in svn.