RFR: 8282638: [JVMCI] Export array fill stubs to JVMCI compiler

[Yi Yang]

Export array _jint_fill,_jshort_fill,jbyte_fill,_arrayof_jshort_fill,_arrayof_jbyte_fill,_arrayof_jint_fill to JVMCI compiler

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Commit messages:
 - 8282638: [JVMCI] Export array fill stubs to JVMCI compiler

Changes: https://git.openjdk.java.net/jdk/pull/7685/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7685&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8282638
  Stats: 7 lines in 1 file changed: 7 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7685.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7685/head:pull/7685

PR: https://git.openjdk.java.net/jdk/pull/7685