The build script needs an .orig file to exist for patch application detection

Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/build.sh b/build.sh
index 79cd308..b3d625f 100644
--- a/build.sh
+++ b/build.sh
@@ -13,7 +13,7 @@
 if [ ! -d openssl-0.9.8w ]; then
     tar xfz openssl-0.9.8w.tar.gz
     cd openssl-0.9.8w
-    patch -p0 <../EDKII_openssl-0.9.8w.patch
+    patch -b -p0 <../EDKII_openssl-0.9.8w.patch
     cd ..
     sh ./Install.sh
 fi