Codereview request for 7152690: Initialization error with charset SJIS_0213 when security manager is enabled

[Xueming Shen]

Hi

Please help codereview the change for #7152690
http://cr.openjdk.java.net/~sherman/7152690/webrev

This is an overlook when we changed SJIS_0213 implementation in 7. The 
"resource reading"
obviously needs to be wrapped in doPrivileged block.

Thanks!
-Sherman