[OpenJDK 2D-Dev] RFR: 8223935: PIT: java/awt/font/WindowsIndicFonts.java fails on windows10

[Philip Race]

Bug: https://bugs.openjdk.java.net/browse/JDK-8223935
Webrev: http://cr.openjdk.java.net/~prr/8223935/

WindowsIndicFonts has been failing randomly depending on
whether a test system has the Indic fonts installed.
This updates the test to not fail on systems which don't have the expected
fonts installed in the typical default location.

-phil.