GM: stop recording all *_pdf.png results as "INVALID" on non-Mac platforms

gm/tests/run.sh

Index: gm/tests/run.sh
===================================================================
--- gm/tests/run.sh	(revision 9647)
+++ gm/tests/run.sh	(working copy)
@@ -108,6 +108,9 @@
   for IMAGEFILE in $(find $ACTUAL_OUTPUT_DIR -name *.png); do
     echo "[contents of $IMAGEFILE]" >$IMAGEFILE
   done
+  for IMAGEFILE in $(find $ACTUAL_OUTPUT_DIR -name *.pdf); do
+    echo "[contents of $IMAGEFILE]" >$IMAGEFILE
+  done

[edisonn, 2013/06/21 14:04:26]

Just a general comment: The thing that I am worried here, is that this kind of
pattern (rewriting content of a file) forces us to replay the whole test, and we
can't simply retry a certain step, we must rewind back from setup. But I don't
know how much valuable it is in practice, through.

   if [ -d $ACTUAL_OUTPUT_DIR/mismatchPath ]; then
     for MISMATCHDIR in $(find $ACTUAL_OUTPUT_DIR/mismatchPath -mindepth 1 -type d); do
       echo "Created additional file to make sure directory isn't empty, because self-test cannot handle empty directories." >$MISMATCHDIR/bogusfile
@@ -199,6 +202,9 @@
 # Compare generated image against an empty "expected image" dir, but NOT in verbose mode.
 gm_test "--hierarchy --match selftest1 $CONFIGS -r $GM_INPUTS/images/empty-dir" "$GM_OUTPUTS/nonverbose"
 
+# Add pdf to the list of configs.
+gm_test "--verbose --hierarchy --match selftest1 $CONFIGS pdf -r $GM_INPUTS/json/identical-bytes.json" "$GM_OUTPUTS/add-config-pdf"
+
 # If run without "-r", the JSON's "actual-results" section should contain
 # actual checksums marked as "failure-ignored", but the "expected-results"
 # section should be empty.