Bug 1381093 - Fix typo in variable declaration. r=dbaron

MozReview-Commit-ID: 7bR9NEFF5pN

--HG--
extra : rebase_source : 143527bfd652c7c3b37609d938dbdf5629494ec8

layout/tools/reftest/reftest.jsm

@@ -118,7 +118,7 @@ var gExpectingProcessCrash = false;
 var gExpectedCrashDumpFiles = [];
 var gUnexpectedCrashDumpFiles = { };
 var gCrashDumpDir;
-var gPendinCrashDumpDir;
+var gPendingCrashDumpDir;
 var gFailedNoPaint = false;
 var gFailedOpaqueLayer = false;
 var gFailedOpaqueLayerMessages = [];