Sigh...still a tinderbox not liking tests -- echoing relevant variables to see their values, still bug 351968

tools/test-harness/xpcshell-simple/test_all.sh

@@ -109,6 +109,10 @@ done
 
 for t in $testdir/test_*.js
 do
+    echo "headfiles: $headfiles"
+    echo "tailfiles: $tailfiles"
+    echo "native_topsrcdir: $native_topsrcdir"
+    echo "topsrcdir: $topsrcdir"
     echo -n "$t: "
     NATIVE_TOPSRCDIR="$native_topsrcdir" TOPSRCDIR="$topsrcdir" $xpcshell $headfiles -f $t $tailfiles 2> $t.log 1>&2
     if [ `grep -c '\*\*\* PASS' $t.log` = 0 ]