loader breaks with -O2 optimizations

[Josh Carroll]

> Presumably you mean -O2 -funroll-loops, not -O2.  Or are you saying the
> latter also breaks the loader?

Just -O2 broke it for me in RELENG_7, for the reason I said before
(-O2 later in the gcc command line supersedes the -Os from the loader
Makefile).

Thanks,
Josh