portaudio: add a minimal patch to configure on Haiku
portaudio: add a minimal patch to configure on Haiku

I have more changes around but nothing working yet.

moochris/haikuports,Begasus/haikuports,haikuports/haikuports,haikuports/haikuports,Begasus/haikuports,miqlas/haikuports,nielx/haikuports,miqlas/haikuports,moochris/haikuports,moochris/haikuports,haikuports/haikuports,koletzky/haikuports,koletzky/haikuports,Begasus/haikuports,Begasus/haikuports,koletzky/haikuports,nielx/haikuports,haikuports/haikuports,haikuports/haikuports,nielx/haikuports,miqlas/haikuports,Begasus/haikuports