RFR(XS): 8148353: [linux-sparc] Crash in libawt.so on Linux SPARC

[Roland Westrelin]

> Code in sharedRuntime_sparc.cpp looks fine but I am worry about CCallingConventionRequiresIntsAsLongs change.

I’m asked to move fast with that fix because it affects a tck test and to backport it to 8. So I’d like to push the sharedRuntime_sparc change and leave the CCallingConventionRequiresIntsAsLongs one out for later. Does that sound good?

Roland.