RFR (XXXS) - 8080940 Remove mcs post-hook from hotspot solaris builds

[Ioi Lam]

Please review a very very small fix:

http://cr.openjdk.java.net/~iklam/8080940-remove-solaris-mcs/

Bug: 8080940 Remove mcs post-hook from hotspot solaris builds

https://bugs.openjdk.java.net/browse/JDK-8080940

Summary of fix:

     I am getting a heart attack every time I look at the
     Solaris build log and it tells me libjvm.so has failed
     when it hasn't. So here's a patch.

     The call to mcs has been removed from LINK_LIB.CXX/POST_HOOK

     According to Magnus's analysis in the bug report, the removal does
not cause any issue.

     I verified the word "mcs" no longer appear in the SPARC build logs,
     and there's no more spurious report of libjvm.so failure.

Tests:

     JPRT with all solaris targets.:
     Build Stats:   5 pass, 0 fail, 0 killed, 0 working, 0 initializing, 
0 not started
     Test Stats:   57 pass, 0 fail, 0 killed, 0 working, 0 initializing, 
0 not started


Thanks
- Ioi