gstreamer: make sure glib-mkenums and glib-genmarshal are found

packages/gstreamer/build.sh

@@ -6,7 +6,16 @@ TERMUX_PKG_SHA256=f94f6696c5f05a3b3a9183e39c5f5c0b779f75a04c0efa497e7920afa985ff
 TERMUX_PKG_SRCURL=https://gstreamer.freedesktop.org/src/gstreamer/gstreamer-${TERMUX_PKG_VERSION}.tar.xz
 TERMUX_PKG_DEPENDS="glib"
 TERMUX_PKG_DEVPACKAGE_DEPENDS="glib-dev"
-TERMUX_PKG_EXTRA_CONFIGURE_ARGS="--disable-check --disable-tests --disable-examples --disable-benchmarks --with-unwind=no --with-dw=no"
+TERMUX_PKG_EXTRA_CONFIGURE_ARGS="
+--disable-check
+--disable-tests
+--disable-examples
+--disable-benchmarks
+--with-unwind=no
+--with-dw=no
+GLIB_GENMARSHAL=/usr/bin/glib-genmarshal
+GLIB_MKENUMS=/usr/bin/glib-mkenums
+"
 
 termux_step_post_make_install() {
 	for BINARY in gst-inspect-1.0 gst-stats-1.0 gst-typefind-1.0 gst-launch-1.0