rm_work: Set BB_SCHEDULER as done in OE.dev to ensure disk space is freed sooner rather than at the end of the build

Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

meta/classes/rm_work.bbclass

@@ -6,6 +6,10 @@
 # INHERIT += "rm_work"
 #
 
+# Use the completion scheulder by default when rm_work is active
+# to try and reduce disk usage
+BB_SCHEDULER ?= "completion"
+
 RMWORK_ORIG_TASK := "${BB_DEFAULT_TASK}"
 BB_DEFAULT_TASK = "rm_work_all"