Add math library back in because of nodefaultlibs. Also move the nodefaultlibs flag earlier so its more clear.

Change-Id: I8e189f86af352b49d1b8c34a97741a5915c30e8b
Merge pull request #24 from awong-dev/add_-lm

Add math library back in because of nodefaultlibs. Also move the nodefau...