E-AC3 patch update

(cherry picked from commit af1f3a70)
Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

extras/contrib/src/Makefile

@@ -1087,7 +1087,7 @@ ifdef NO_TEXT_RELOCATION
 	echo "Broken LD. Fix your tools."
 	exit -1
 endif
-	patch -p0 < Patches/eac3_spectral.patch
+	(cd $@; patch -p1 < ../Patches/eac3_spectral.patch)
 else
 ffmpeg-$(FFMPEG_VERSION).tar.gz:
 	echo "ffmpeg snapshot is too old, you MUST use subversion !"