Add an example program that utilizes multiple threads in the JIT to process
work. This was used by Evan Jones as the original test case for ensuring
that the ExecutionEngine was thread safe.

Original source by Evan Jones (adapted from other LLVM JIT examples) and
made LLVM style compliant by Reid Spencer.

llvm-svn: 22411

llvm-svn: 16719

Made the "ModuleMaker" into an example since its just one source file.

llvm-svn: 16003

Make the "DIRS" option descend any directory with a Makefile.

llvm-svn: 16001

llvm-svn: 15999

llvm-svn: 15937

problem where Depend or Debug directories prevent CVS from nuking an obsolete
project dir

llvm-svn: 15935

by scanning the source tree (not the object tree).

llvm-svn: 10223

llvm-svn: 9313

llvm-svn: 7017