Add Haiku support

[robante15]

Description Changes required to run on Haiku

• Possibility of static link for libgamestream (If not done, it creates libraries that have the path hardcoded)
• Haiku's network library is linked for the use of sockets
• The use of discover.c is disabled, since Haiku does not have Avahi
• The use of evdev.c and udev.c is disabled (Haiku does not have these libraries)
• loop.c is disabled since Haiku does not have signalfd.h

Bugs

• Error message: setsockopt(TCP_NOOPT, 1) failed: -2147483643
• The cursor cannot be moved out of the window
• "make install" does not work, so it is not installed within the system, it remains as a "portable" executable