graphics/azpainter{,b}: unbreak the build against modern fontconfig

Somewhere between fontconfig versions 2.14.2 and 2.17.1, -lfreetype
disappeared from the pkg-config --libs fontconfig output, causing
the breakage. Adjust the configure script to detect both libraries
correctly. While here, strip the binary upon installation (subject
to -DWITH_DEBUG) and update WWW line.

Reported by: pkg-fallout