meson: improve subproject builds
Add meson subproject wrapfiles for all the openbmc projects we utilize
and fix the missing dependency for cereal. There is still a missing
dependency for the `ldap.h` that prevents a full wrap-based build.
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: If3a5836c3ff9a34d5624c60ac00c8fd46bfba20b
diff --git a/subprojects/phosphor-dbus-interfaces.wrap b/subprojects/phosphor-dbus-interfaces.wrap
new file mode 100644
index 0000000..346aa0c
--- /dev/null
+++ b/subprojects/phosphor-dbus-interfaces.wrap
@@ -0,0 +1,6 @@
+[wrap-git]
+url = https://github.com/openbmc/phosphor-dbus-interfaces.git
+revision = HEAD
+
+[provide]
+phosphor-dbus-interfaces = phosphor_dbus_interfaces_dep