Rename regression test and reenable disabled test.

The regression test for v8 issue 969 was committed with the wrong file
name.  Also reenable a test that was disabled due to that issue.

Review URL: http://codereview.chromium.org/5707008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5992 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/mjsunit/mjsunit.status

@@ -56,8 +56,6 @@ regress/regress-524: (PASS || TIMEOUT), SKIP if $mode == debug
 debug-liveedit-check-stack: SKIP
 debug-liveedit-patch-positions-replace: SKIP
 
-# Issue 969, flaky in debug mode, hits assertion in deoptimzer-ia32.cc
-array-splice: PASS, SKIP if $mode == debug
 
 ##############################################################################
 [ $arch == arm ]