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>
diff --git a/configure.ac b/configure.ac
index 90db672..2be2277 100644
--- a/configure.ac
+++ b/configure.ac
@@ -634,6 +634,10 @@
 
 AC_CONFIG_FILES([Makefile src/version.h src/weston.pc])
 
+# AC_CONFIG_FILES needs the full name when running autoconf, so we need to use
+# libweston_abi_version here, and outside [] because of m4 quoting rules
+AC_CONFIG_FILES([src/libweston-]libweston_abi_version[.pc:src/libweston.pc.in])
+
 AM_CONDITIONAL([HAVE_GIT_REPO], [test -f $srcdir/.git/logs/HEAD])
 
 AC_OUTPUT