Makes it easier to compile the native counterpart of the PortAudio support with different paths to portaudio and java dev files.

src/native/portaudio/Makefile

@@ -1,5 +1,5 @@
-PORTAUDIO_HOME=/home/damencho/dev/portaudio/portaudio
-JAVA_HOME=/usr/lib/jvm/java-6-sun
+PORTAUDIO_HOME?=/home/damencho/dev/portaudio/portaudio
+JAVA_HOME?=/usr/lib/jvm/java-6-sun
 
 ARCH=$(shell uname -m | sed -e s/x86_64/-64/ -e s/i.86//)
 TARGET=../../../lib/native/linux$(ARCH)/libjportaudio.so
@@ -10,7 +10,7 @@ CPPFLAGS=-DJNI_IMPLEMENTATION \
          -I$(JAVA_HOME)/include -I$(JAVA_HOME)/include/linux \
          -I$(PORTAUDIO_HOME)/include
 LDFLAGS=-shared
-LIBS=-L$(PORTAUDIO_HOME)/lib/.libs -lasound -lm -lpthread -ljack -static -lportaudio
+LIBS=-L$(PORTAUDIO_HOME)/lib/.libs -lasound -lm -lpthread -static -lportaudio
 
 $(TARGET): net_java_sip_communicator_impl_media_protocol_portaudio_PortAudio.c net_java_sip_communicator_impl_media_protocol_portaudio_PortAudio.h
 	$(CC) $(CPPFLAGS) $< $(LDFLAGS) -o $@ $(LIBS)