ios: fixing DYLD_FALLBACK_FRAMEWORK_PATH

adding /System/Library/Frameworks for completeness

Change-Id: If2fbe015af591eb3ff820b2ea2f732b2d4c08e01
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@digia.com>
ios: cleaner kill of subprocess of iostoolhandler

try to first terminate (sig TERM) the tool before
killing it (this ensures a cleaner shutdown of the
connection to the device).

Task-number: QTCREATORBUG-10922
Change-Id: Ib39fbd1d35a651cdb51364532bdef5b69cb1347e
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@digia.com>