mdadm: fixed to compile and install even if there is no /run

base/mdadm/mdadm.conf

@@ -3,6 +3,7 @@
 # This copyright note is auto-generated by ./scripts/Create-CopyPatch.
 #
 # Filename: package/.../mdadm/mdadm.conf
+# Copyright (C) 2014 The OpenSDE Project
 # Copyright (C) 2004 - 2006 The T2 SDE Project
 # Copyright (C) 1998 - 2003 Clifford Wolf
 #
@@ -21,3 +22,6 @@ unset STRIP
 
 # breaking strict aliasing rules..
 var_append GCC_WRAPPER_APPEND ' ' "-fno-strict-aliasing"
+
+var_append makeopt ' ' "RUN_DIR=$root/dev/.mdadm"
+var_append makeinstopt ' ' "RUN_DIR=$root/dev/.mdadm"