Bug#16064876 MAIN.KILL FAILS OCCASIONALLY ON SOL10 SPARC64

Analysis:
On solaris, killing a connection which waits on debug sync
(waits on condition variable) is neglected. Subsequent kill
connection to that thread succeeds. Debug sync code is not
included in release build hence it is not an customer issue.
Also verified that except this case, other cases succeed in
main.kill test script. So moving this test to experimental
state on solaris platform only in mysql-5.5 branch.

mysql-test/collections/default.experimental

@@ -6,6 +6,7 @@ binlog.binlog_multi_engine               # joro : NDB tests marked as experiment
 funcs_1.charset_collation_1              # depends on compile-time decisions
 
 main.func_math @freebsd                  # Bug#11751977 2010-05-04 alik main.func_math fails on FreeBSD in PB2
+main.kill @solaris                       # Bug#16064876 2013-01-02 prthirum main.kill fails on sol10 sparc64 
 main.lock_multi_bug38499                 # Bug#11755645 2009-09-19 alik main.lock_multi_bug38499 times out sporadically
 main.outfile_loaddata @solaris           # Bug#11755168 2010-01-20 alik Test "outfile_loaddata" fails (reproducible)
 main.signal_demo3 @solaris               # Bug#11753919 2010-01-20 alik Several test cases fail on Solaris with error Thread stack overrun