layer.conf: Whitelist lttng-tools->lttng-modules dependency

The API between lttng-tools and lttng-modules is safe, whitelist it as
the dependency fixes tools failures. This needs a hack in the multilib
class as right now there is no way to know if a given recipe is a kernel
module or not. This needs to be revisited.

(From OE-Core rev: 584e713bf7f6885a13c440cd45c0f469feb3a694)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/multilib_global.bbclass

@@ -118,6 +118,9 @@ def preferred_ml_updates(d):
             d.renameVar(prov, provexp)
 
     def translate_provide(prefix, prov):
+        # Really need to know if kernel modules class is inherited somehow
+        if prov == "lttng-modules":
+            return prov
         if not prov.startswith("virtual/"):
             return prefix + "-" + prov
         if prov == "virtual/kernel":

meta/conf/layer.conf

@@ -77,6 +77,7 @@ SIGGEN_EXCLUDE_SAFE_RECIPE_DEPS += " \
   weston-init->weston \
   weston-init->kbd \
   connman->xl2tpd \
+  lttng-tools->lttng-modules \
 "
 
 # Avoid adding bison-native to the sysroot without a specific