Commits V22 source codes. We need to apply patch for iOS in next step.
[iOS] Patch for spidermonkey v22.
[iOS] Adding ios.m4.
[iOS] Patch for AsmJS.h.
[v22] Updating configure file.
[v22] Adding 'intl/icu/source/common/unicode' folder since it's needed in v22. You could refer to js/src/buildin/Intl.cpp. The SDK of iOS contains 'unicode/utypes.h', however, other platforms don't include it.
Merge pull request #20 from dumganhar/v22

Upgrading SpiderMonkey to FireFox v22.