bamtools: use checksummed patch
root: Fix compilation error with X11 backend

ROOT compilation with X11 backend may fail if there is a clash between
homebrewed freetype>=2.5.1 in /usr/local/include/freetype and XQuartz
freetype<2.5.1. This patch rises XQuartz'es includes priority so that
clang doesn't try to halfbreed freetype headers.

Closes #853.
Closes #868.