build-all: some convenience fixes

* mkdir -p build_dir instead of just failing
* Add perf / noperf targets since building "all" is often unnecessary

Change-Id: I3216f59338ca37e87b464cccbb9c1cc766356a6c
Signed-off-by: Patrick Pannuto <ppannuto@codeaurora.org>
(cherry picked from commit b4f13cfa5a53633c0246b2136decc5d210cfcd70)