Updated SmallObj test Makefile to fit renaming of SmallSingleton to SmallObjSingleton
Fixed .PHONY targets
Removed useless "using namespace Loki;".
Make it easier to add a new test subtarget
- Don't create temporary object files anymore, use implicit rule for binaries
- Make it easier to overwrite CXXFLAGS, by using CPPFLAGS for loki specific stuff
- Removed for loop from test/Makefile to make it work with mingw
- Added clean-tmp target that only removes the object files, but leaves the static lib