Add test case where main exec is not instrumented,
and dependent shared lib is instrumented

Will put back once code is fixed in branch

Regular main executable combined with instrumented library not yet working

setup critical edge breaking to 1) emit a map of critical edges, and 2) parameterize which edge types get broken

setup critical edge breaking to 1) emit a map of critical edges, and 2) parameterize which edge types get broken

reworked the red-zone detector to do better than just using leaf functions, as we found the red zone used in a non-leaf function