Build infrastructure

The infrastructure to build libibm_dbus.so.

This was all copied from openpower-dbus-interfaces.

Change-Id: Ic9f656a1b59078c81801da3594f0b930411cf47b
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
diff --git a/Makefile.interfaces.in b/Makefile.interfaces.in
new file mode 100644
index 0000000..714e6d0
--- /dev/null
+++ b/Makefile.interfaces.in
@@ -0,0 +1 @@
+# Empty file so that 'configure' attempts to generate Makefile.interfaces.