RFR (S): 8069389: CompilerOracle prefix wildcarding is broken for long strings on Mac and Solaris

[Nils Eliasson]

Hi,

Can I please have a review for this small change.

Tom found a error in the CompilerOracle method matcher. This bug can be 
seen on Mac and Solaris.

I have changed from strcopy to memmove as Tom suggested and created a 
simple regression test.

Bug: https://bugs.openjdk.java.net/browse/JDK-8069389
Webrev: http://cr.openjdk.java.net/~neliasso/8069389/webrev.01/

Best regards,
Nils