libx264: Minor cosmetic change

packages/libx264/build.sh

@@ -2,9 +2,12 @@ TERMUX_PKG_HOMEPAGE=http://www.videolan.org/developers/x264.html
 TERMUX_PKG_DESCRIPTION="Library for encoding video streams into the H.264/MPEG-4 AVC format"
 TERMUX_PKG_VERSION="20160503-2245"
 TERMUX_PKG_SRCURL=ftp://ftp.videolan.org/pub/videolan/x264/snapshots/x264-snapshot-${TERMUX_PKG_VERSION}.tar.bz2
-if [ $TERMUX_ARCH = "i686" -o $TERMUX_ARCH = "x86_64" ]; then
-        # Avoid text relocations. Only needed on i686, see:
-        # https://mailman.videolan.org/pipermail/x264-devel/2016-March/011589.html
-	# Also disable on x86_64 for now due to build errors.
-        TERMUX_PKG_EXTRA_CONFIGURE_ARGS="--disable-asm"
-fi
+
+termux_step_pre_configure () {
+	if [ $TERMUX_ARCH = "i686" -o $TERMUX_ARCH = "x86_64" ]; then
+		# Avoid text relocations. Only needed on i686, see:
+		# https://mailman.videolan.org/pipermail/x264-devel/2016-March/011589.html
+		# Also disable on x86_64 for now due to build errors.
+		TERMUX_PKG_EXTRA_CONFIGURE_ARGS="--disable-asm"
+	fi
+}