lit: Fix bug in --show-suites which accidentally override the list of tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86653 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/lit/lit.py b/utils/lit/lit.py
index d4820d0..70bd060 100755
--- a/utils/lit/lit.py
+++ b/utils/lit/lit.py
@@ -452,8 +452,8 @@
         print '-- Test Suites --'
         suitesAndTests = suitesAndTests.items()
         suitesAndTests.sort(key = lambda (ts,_): ts.name)
-        for ts,tests in suitesAndTests:
-            print '  %s - %d tests' %(ts.name, len(tests))
+        for ts,ts_tests in suitesAndTests:
+            print '  %s - %d tests' %(ts.name, len(ts_tests))
             print '    Source Root: %s' % ts.source_root
             print '    Exec Root  : %s' % ts.exec_root