openmotif: hack to fix VendorShell reference for XQuartz 2.7.9 and 2.7.10
openmotif: hack to fix VendorShell reference for XQuartz 2.7.9 and 2.7.10

Closes #270.

Signed-off-by: Andrew Janke <02e0a999c50b1f88df7a8f5a04e1b76b35ea6a88@apjanke.net>

BrewTestBot/homebrew-x11