Tweaks to build_static.bat - run from anywhere, avoid warnings.
Tweaks to build_static.bat - run from anywhere, avoid warnings.

MikeMarcin/UIforETW,MikeMarcin/UIforETW,ariccio/UIforETW,google/UIforETW,u-engine/UIforETW,google/UIforETW,OSVR/UIforETW,ariccio/UIforETW,MikeMarcin/UIforETW,modulexcite/UIforETW,mwinterb/UIforETW,modulexcite/UIforETW,u-engine/UIforETW,mwinterb/UIforETW,ariccio/UIforETW,google/UIforETW,u-engine/UIforETW,OSVR/UIforETW,modulexcite/UIforETW,OSVR/UIforETW,google/UIforETW,mwinterb/UIforETW,ariccio/UIforETW