utils: Exclude OVERRIDES from hashes in multilib functions

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

meta/classes/utils.bbclass

@@ -369,6 +369,7 @@ def get_multilib_datastore(variant, d):
     localdata.setVar("OVERRIDES", overrides)
     localdata.setVar("MLPREFIX", variant + "-")
     return localdata
+get_multilib_datastore[vardepsexclude] = "OVERRIDES"
 
 def all_multilib_tune_values(d, var, unique = True, need_split = True, delim = ' '):
     """Return a string of all ${var} in all multilib tune configuration"""
@@ -431,6 +432,7 @@ def all_multilib_tune_list(vars, d):
         values[v].append(localdata.getVar(v))
         values['ml'].append(item)
     return values
+all_multilib_tune_list[vardepsexclude] = "OVERRIDES"
 
 # If the user hasn't set up their name/email, set some defaults
 check_git_config() {