contrib: use speexdsp 1.2rc2

(cherry picked from commit 67066bf6dccc61ff15b6385dd80451a025a5217d)

contrib/src/speexdsp/rules.mak

 # speexdsp
 
-SPEEXDSP_VERSION := git
-SPEEXDSP_HASH := HEAD
-SPEEXDSP_GITURL := http://git.xiph.org/?p=speexdsp.git;a=snapshot;h=$(SPEEXDSP_HASH);sf=tgz
+SPEEXDSP_VERSION := 1.2rc2
+SPEEXDSP_URL := http://downloads.us.xiph.org/releases/speex/speexdsp-$(SPEEXDSP_VERSION).tar.gz
 
 PKGS += speexdsp
 ifeq ($(call need_pkg,"speexdsp"),)
 PKGS_FOUND += speexdsp
 endif
 
-$(TARBALLS)/speexdsp-git.tar.gz:
-	$(call download,$(SPEEXDSP_GITURL))
+$(TARBALLS)/speexdsp-$(SPEEXDSP_VERSION).tar.gz:
+	$(call download,$(SPEEXDSP_URL))
 
 .sum-speexdsp: speexdsp-$(SPEEXDSP_VERSION).tar.gz
-	$(warning $@ not implemented)
-	touch $@
 
 speexdsp: speexdsp-$(SPEEXDSP_VERSION).tar.gz .sum-speexdsp
-	rm -Rf $@-git $@
-	mkdir -p $@-git
-	$(ZCAT) "$<" | (cd $@-git && tar xv --strip-components=1)
+	$(UNPACK)
 	$(MOVE)
 
 SPEEXDSP_CONF := --enable-resample-full-sinc-table --disable-examples