apache: correct cross flags

Following change in apr.

srcpkgs/apache/template

@@ -20,9 +20,7 @@ configure_args="--prefix= --sbindir=/usr/bin --enable-pie --enable-modules=all
  --enable-dav-lock --enable-vhost-alias --enable-imagemap --enable-so
  --enable-rewrite --enable-layout=XBPS --sysconfdir=/etc/${pkgname}
  --enable-mpms-shared=all --with-pcre=${XBPS_CROSS_BASE}/usr
- --with-z=${XBPS_CROSS_BASE}/usr
- --with-apr=${XBPS_CROSS_BASE}/usr/bin/apr-1-config
- --with-apr-util=${XBPS_CROSS_BASE}/usr/bin/apu-1-config"
+ --with-z=${XBPS_CROSS_BASE}/usr"
 conf_files="
 	/etc/${pkgname}/extra/*.conf
 	/etc/${pkgname}/httpd.conf
@@ -64,6 +62,13 @@ pre_configure() {
 		-i docs/conf/httpd.conf.in
 
 	cat ${FILESDIR}/xbps.layout >> config.layout
+	if [ "$CROSS_BUILD" ]; then
+		configure_args+=" --with-apr=$XBPS_WRAPPERDIR/apr-1-config
+		 --with-apr-util=$XBPS_WRAPPERDIR/apu-1-config"
+	else
+		configure_args+=" --with-apr=/usr/bin/apr-1-config
+		 --with-apr-util=/usr/bin/apu-1-config"
+	fi
 }
 
 post_configure() {