[8u20] RFR (XS): 8033805: Move Fast_Lock/Fast_Unlock code from .ad files to macroassembler

[Vladimir Kozlov]

Please, review backport to 8u20. Changes were tested for two weeks in 
jdk9 sources.

https://bugs.openjdk.java.net/browse/JDK-8033805
http://cr.openjdk.java.net/~kvn/8033805/webrev/
http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/5292439ef895

Thanks,
Vladimir