implement "usermrf" fstab flag to force rm -rf * deletion on specific partitions

Change-Id: I58f4a8cedf31e6b6efd88f96a43ed525603ae311
diff --git a/partitionmanager.cpp b/partitionmanager.cpp
index 77cf37e..78fbfa4 100644
--- a/partitionmanager.cpp
+++ b/partitionmanager.cpp
@@ -162,6 +162,8 @@
 		printf("Can_Be_Mounted ");
 	if (Part->Can_Be_Wiped)
 		printf("Can_Be_Wiped ");
+	if (Part->Use_Rm_Rf)
+		printf("Use_Rm_Rf ");
 	if (Part->Can_Be_Backed_Up)
 		printf("Can_Be_Backed_Up ");
 	if (Part->Wipe_During_Factory_Reset)