build: Generate package-config file

Change-Id: I4aeaa38e190d2327e08106d42f83f9476beccccd
Signed-off-by: Deepak Kodihalli <dkodihal@in.ibm.com>
diff --git a/Makefile.am b/Makefile.am
index 6e63e81..105f33a 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -10,6 +10,9 @@
 BUILT_SOURCES = libopenpower_dbus.cpp
 CLEANFILES = libopenpower_dbus.cpp
 
+pkgconfiglibdir = ${libdir}/pkgconfig
+pkgconfiglib_DATA = openpower-dbus-interfaces.pc
+
 clean-local: clean-dbus
 
 -include Makefile.interfaces