build: Generate package-config file

Change-Id: Ib776dad5936f1542fd2855a67954f2959c23ef45
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/phosphor-dbus-interfaces.pc.in b/phosphor-dbus-interfaces.pc.in
new file mode 100644
index 0000000..3240872
--- /dev/null
+++ b/phosphor-dbus-interfaces.pc.in
@@ -0,0 +1,11 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: phosphor-dbus-interfaces
+Description: Generated sdbusplus bindings for phosphor-dbus-interfaces.
+URL: https://github.com/openbmc/phosphor-dbus-interfaces
+Version: @VERSION@
+Libs: -L@libdir@ -lphosphor_dbus
+Cflags: -I@includedir@