When parallel make it will fail with multi copy, see
http://bugzilla.pokylinux.org/show_bug.cgi?id=1202

Upstream-Status: Pending

Signed-off-by: Kang Kai <kai.kang@windriver.com>
--- ghostscript-9.02/base/unixhead.mak.orig	2011-07-27 17:06:17.749456100 +0800
+++ ghostscript-9.02/base/unixhead.mak	2011-07-27 17:06:37.449456100 +0800
@@ -54,7 +54,7 @@
 
 # Define generic commands.
 
-CP_=cp
+CP_=cp -f
 RM_=rm -f
 RMN_=rm -f