build: Generate package-config file

Change-Id: Id3fc546c7fabe34bc31c4030d2e196f6d7f39090
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
diff --git a/configure.ac b/configure.ac
index f1c9995..0a06ff0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -72,4 +72,5 @@
 
 # Create configured output
 AC_CONFIG_FILES([Makefile test/Makefile tools/Makefile tools/setup.py])
+AC_CONFIG_FILES([sdbusplus.pc])
 AC_OUTPUT