osxfuse 2.7.1

Release to fix the compile issues around Yosemite & Xcode 6.1. See
https://github.com/osxfuse/osxfuse/commit/45a3e24f202163f0a3cadc16cfd67afb95cb8ca4
for more information.

Closes #32237.
Closes #32307.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
osxfuse: update 2.7.1 bottle.
Added qt-assistant-compat package.
Added pkg-config dependencies.
qt-assistant-compat: add 4.6.3 bottle.