esound: Fix build when B != S

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-oe/recipes-multimedia/esound/esound_0.2.36.bb

@@ -22,7 +22,7 @@ EXTRA_OECONF = " \
     --disable-artstest \
 "
 do_configure_prepend() {
-    sed -i -e 's:/usr/include/mme:${STAGING_INCDIR}/mme:g' configure.ac
+    sed -i -e 's:/usr/include/mme:${STAGING_INCDIR}/mme:g' ${S}/configure.ac
 }
 
 PACKAGES =+ "esddsp esd esd-utils"