Fix C++ comment in C source



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@162887 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/c-index-test/c-index-test.c b/tools/c-index-test/c-index-test.c
index 2cbeadc..caf3ba1 100644
--- a/tools/c-index-test/c-index-test.c
+++ b/tools/c-index-test/c-index-test.c
@@ -740,7 +740,7 @@
         lineCols[I].line = line;
         lineCols[I].col = column;
       }
-      // Make the order of the override list deterministic.
+      /* Make the order of the override list deterministic. */
       qsort(lineCols, num_overridden, sizeof(LineCol), lineCol_cmp);
       for (I = 0; I != num_overridden; ++I) {
         if (I)