CMake fixes for Cotie and GCC 4.4 compatibility

[jdetter]

This will fix build issues on Follis which will fix most of the Jenkins issues right now. This also includes the make install fix #160 and also the nullptr compatibility issue #162.

[jdetter]

Dyninst build finally passing again, test_pt_ls is still a work in progress. I didn't have any time to look at it last week because I was working on this. I will be looking at test_pt_ls the rest of today and tomorrow.

@wrwilliams and other admins, ok to merge?

[jdetter]

I'm actually having weird CMake issues with this after a clean clone/build. I'm not sure why this isn't reflected in the jenkins.

[cuviper]

I appreciate the conditional cotire. Can we also guard this on CMake version? The cotire.cmake mandates 2.8.12, but RHEL7 has only 2.8.11 -- yet a new enough GCC to pass your test.

[jdetter]

Yup I can add that as well!

[jdetter]

I have tested this on all versions of GCC that the CSL provides. It looks like we need to disable Cotire up to GCC version 4.5.0. Cotire is also disabled if the CMake version isn't at lease 2.8.12.

Cotire also only supports GNU, Intel and Clang compilers on Linux. I didn't mess with changing the Cotire configuration for Windows because it looks like the Cotire support for Windows is pretty good.

This is ready for a merge whenever someone thinks it's ready.

[jdetter]

@wrwilliams can this be merged in?

[wrwilliams]

Looks clean to me. Any objections/observed regressions from @cuviper?

[cuviper]

Works for me.