contrib: vorbis: fix inverted HAVE_FPU check

(cherry picked from commit d31d221b21df2a1b38e1dc2e95f2b8f12aac8db2)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

contrib/src/vorbis/rules.mak

@@ -4,7 +4,7 @@ VORBIS_VERSION := 1.3.2
 VORBIS_URL := http://downloads.xiph.org/releases/vorbis/libvorbis-$(VORBIS_VERSION).tar.xz
 #VORBIS_URL := $(CONTRIB_VIDEOLAN)/libvorbis-$(VORBIS_VERSION).tar.gz
 
-ifndef HAVE_FPU
+ifdef HAVE_FPU
 PKGS += vorbis
 endif
 ifeq ($(call need_pkg,"vorbis >= 1.1"),)