RFR : fix JVM_GetGraalServiceImpls signature

[Igor Ignatyev]

Hi all,

please review the patch which fixes the signature of 
JVM_GetGraalServiceImpls function.

c.o.g.api.runtime.Services.getServiceImpls method has one argument w/ 
type j.l.Class, but the declaration of linked native method had the 
incorrect signature '(JNIEnv,jclass)' instead of '(JNIEnv,jclass,jclass).

http://cr.openjdk.java.net/~iignatyev/graal/JVM_GetGraalServiceImpls/webrev.00/

-- 
Thanks,
Igor