Request for reviews (XS): 6875866 for HS16

[Vladimir Kozlov]

http://cr.openjdk.java.net/~kvn/6875866_hs16/webrev.00

Fixed 6875866: Intrinsic for String.indexOf() is broken on x86 with SSE4.2

Problem:
String.indexOf SSE4.2 code starts string rescanning from
a wrong place after failing to match a part of substring.

Solution:
Start from the next element after the previous match.

Reviewed by:

Fix verified (y/n): y, test

Other testing:
JPRT