meson: Add phosphor-dbus-interfaces dependency

This dependency was added with b15df6b2 but not added to meson.build,
which prevents the project from building in meson subproject mode.

Fixes: b15df6b28b97a0887e52d5f5e5899b10475943e1
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
Change-Id: I0653d6c7599cfcfc3d66c9e326a0a691bc6f978e
diff --git a/subprojects/phosphor-dbus-interfaces.wrap b/subprojects/phosphor-dbus-interfaces.wrap
index 935a8b2..346aa0c 100644
--- a/subprojects/phosphor-dbus-interfaces.wrap
+++ b/subprojects/phosphor-dbus-interfaces.wrap
@@ -1,3 +1,6 @@
 [wrap-git]
 url = https://github.com/openbmc/phosphor-dbus-interfaces.git
 revision = HEAD
+
+[provide]
+phosphor-dbus-interfaces = phosphor_dbus_interfaces_dep