Create a libweston-0.so

This commit also adds a libweston-0.pc file. The -0 is the abi version
introduced in the previous patch.

Signed-off-by: Giulio Camuffo <giuliocamuffo@gmail.com>
Reviewed-by: Quentin Glidic <sardemff7+git@sardemff7.net>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>

src/libweston.pc.in

@@ -0,0 +1,12 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+pkgincludedir=${includedir}/libweston-@LIBWESTON_ABI_VERSION@
+
+Name: libweston API
+Description: Header files for libweston compositors development
+Version: @WESTON_VERSION@
+Requires.private: wayland-server pixman-1 xkbcommon
+Cflags: -I${pkgincludedir}
+Libs: -L${libdir} -lweston-@LIBWESTON_ABI_VERSION@

src/weston.pc.in

@@ -8,5 +8,5 @@ pkglibexecdir=${libexecdir}/@PACKAGE@
 Name: Weston Plugin API
 Description: Header files for Weston plugin development
 Version: @WESTON_VERSION@
-Requires.private: wayland-server pixman-1 xkbcommon
-Cflags: -I${includedir}/weston -I{includedir}/libweston-@LIBWESTON_ABI_VERSION@
+Requires.private: libweston-@LIBWESTON_ABI_VERSION@
+Cflags: -I${includedir}/weston