component/gtk-2: add slapos python3 in PATH

component/gtk-2/buildout.cfg

@@ -14,6 +14,7 @@ extends =
   ../libtool/buildout.cfg
   ../m4/buildout.cfg
   ../perl/buildout.cfg
+  ../python3/buildout.cfg
   ../pkgconfig/buildout.cfg
   ../xorg/buildout.cfg
   ../icu/buildout.cfg
@@ -81,7 +82,7 @@ configure-options =
   --disable-static
   --disable-gtk-doc-html
 environment =
-  PATH=${glib:location}/bin:${freetype:location}/bin:${pkgconfig:location}/bin:${xz-utils:location}/bin:%(PATH)s
+  PATH=${glib:location}/bin:${python3:location}/bin:${freetype:location}/bin:${pkgconfig:location}/bin:${xz-utils:location}/bin:%(PATH)s
   PKG_CONFIG_PATH=${:pkg_config_depends}
   LDFLAGS=-Wl,-rpath=${gettext:location}/lib -Wl,-rpath=${bzip2:location}/lib -Wl,-rpath=${zlib:location}/lib -Wl,-rpath=${harfbuzz:location}/lib -Wl,-rpath=${glib:location}/lib
 
@@ -107,7 +108,7 @@ md5sum = 4dcea15cbf166706c166fc4fee05e3f8
 configure-command = ${meson:location}/bin/meson builddir --wrap-mode=nodownload --libdir=lib -Dprefix=@@LOCATION@@ -Ddocs=false -Dintrospection=false
 make-binary = ninja -C builddir
 environment =
-  PATH=${glib:location}/bin:${ninja:location}/bin:${pkgconfig:location}/bin:${xz-utils:location}/bin:%(PATH)s
+  PATH=${glib:location}/bin:${python3:location}/bin:${ninja:location}/bin:${pkgconfig:location}/bin:${xz-utils:location}/bin:%(PATH)s
   PKG_CONFIG_PATH=${glib:location}/lib/pkgconfig:${glib:pkg_config_depends}
   CFLAGS=-I${gettext:location}/include
   LDFLAGS=-L${gettext:location}/lib -lintl -Wl,-rpath=${gettext:location}/lib -Wl,-rpath=${glib:location}/lib
@@ -127,7 +128,7 @@ configure-options =
   --disable-xinerama
   --disable-gtk-doc-html
 environment =
-  PATH=${gdk-pixbuf:location}/bin:${glib:location}/bin:${perl:location}/bin:${pkgconfig:location}/bin:${xz-utils:location}/bin:%(PATH)s
+  PATH=${python3:location}/bin:${gdk-pixbuf:location}/bin:${glib:location}/bin:${perl:location}/bin:${pkgconfig:location}/bin:${xz-utils:location}/bin:%(PATH)s
   PKG_CONFIG_PATH=${:pkg_config_depends}
 # not taken from pkg-config result...
   CPPFLAGS=-I${gettext:location}/include -I${libX11:location}/include/ -I${xproto:location}/include -I${xorgproto:location}/include -I${libXrender:location}/include -I${renderext:location}/include -I${libXext:location}/include