Add another CSS reference for local docs.

It looks like the CSS is located in a slightly different location
when viewing directly from out/ paths, so try loading both CSS paths.

Test: make -j32 offline-system-sdk-referenceonly-diff
Bug: 69115817
Change-Id: Ic7dfc0be95494444ed4705b612dd1a88c1223bfb
diff --git a/src/jdiff/HTMLReportGenerator.java b/src/jdiff/HTMLReportGenerator.java
index 5ba10a6..f45e9ac 100755
--- a/src/jdiff/HTMLReportGenerator.java
+++ b/src/jdiff/HTMLReportGenerator.java
@@ -734,6 +734,7 @@
     public void writeStyleSheetRef(boolean inSameDir) {
         if (inSameDir) {
             writeText("<link href=\"../../../assets/android-developer-docs.css\" rel=\"stylesheet\" type=\"text/css\" />");
+            writeText("<link href=\"../../assets/android-developer-docs.css\" rel=\"stylesheet\" type=\"text/css\" />");
             writeText("<link href=\"stylesheet-jdiff.css\" rel=\"stylesheet\" type=\"text/css\" />");
             writeText("<noscript>");
             writeText("<style type=\"text/css\">");
@@ -749,6 +750,7 @@
             writeText("</style>");
 	    } else {
             writeText("<link href=\"../../../../assets/android-developer-docs.css\" rel=\"stylesheet\" type=\"text/css\" />");
+            writeText("<link href=\"../../../assets/android-developer-docs.css\" rel=\"stylesheet\" type=\"text/css\" />");
             writeText("<link href=\"../stylesheet-jdiff.css\" rel=\"stylesheet\" type=\"text/css\" />");
             writeText("<noscript>");
             writeText("<style type=\"text/css\">");