build: enable meson build

Add meson build support.  Autotools support will be removed in
the future once the consuming meta-phosphor recipes are updated.

This should be feature complete relative to the previous autotools
support.

Additionally, support is added for using sdbusplus as a subproject
in the event that users do not have sdbusplus installed.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ic2c0129bda11cf10aaa557c2fd6403e2ed2cd8dd
diff --git a/meson_options.txt b/meson_options.txt
new file mode 100644
index 0000000..929055d
--- /dev/null
+++ b/meson_options.txt
@@ -0,0 +1,4 @@
+option('libphosphor_dbus', type: 'boolean', value: true)
+option('data_com_ibm', type: 'boolean', value: false)
+option('data_org_open_power', type: 'boolean', value: false)
+option('data_xyz_openbmc_project', type: 'boolean', value: true)