contrib: remove portaudio

contrib/src/portaudio/SHA512SUMS

-28cc2a13d8b4a6a60c5bcaab74971bdb7aa10cbce38b442dced974efd0a5180f291452099fd10a816bb715d5eb29428711493a0a2a26f30a7ffa91234bb26517  portaudio-19_20110326.tar.gz

contrib/src/portaudio/portaudio-cross.patch

-diff -ruN portaudio/Makefile.in portaudio.n/Makefile.in
---- portaudio/Makefile.in	2007-10-24 17:29:04.000000000 +0200
-+++ portaudio.n/Makefile.in	2007-12-18 05:43:27.000000000 +0100
-@@ -120,7 +120,7 @@
- SUBDIRS =
- @ENABLE_CXX_TRUE@SUBDIRS += bindings/cpp
- 
--all: lib/$(PALIB) all-recursive tests
-+all: lib/$(PALIB) all-recursive
- 
- tests: bin-stamp $(TESTS)
- 

contrib/src/portaudio/rules.mak

-# portaudio
-
-PORTAUDIO_VERSION := 19_20110326
-PORTAUDIO_URL := http://www.portaudio.com/archives/pa_stable_v$(PORTAUDIO_VERSION).tgz
-
-ifdef HAVE_WIN32
-PKGS += portaudio
-endif
-
-ifeq ($(call need_pkg,"portaudio"),)
-PKGS_FOUND += portaudio
-endif
-
-$(TARBALLS)/portaudio-$(PORTAUDIO_VERSION).tar.gz:
-	$(call download,$(PORTAUDIO_URL))
-
-.sum-portaudio: portaudio-$(PORTAUDIO_VERSION).tar.gz
-
-portaudio: portaudio-$(PORTAUDIO_VERSION).tar.gz .sum-portaudio
-	$(UNPACK)
-	patch -p0 < $(SRC)/portaudio/portaudio-cross.patch
-
-.portaudio: portaudio
-	cd $< && $(HOSTVARS) ./configure $(HOSTCONF)
-	cd $< && $(MAKE) && $(MAKE) install
-	touch $@