RFR: 8252881: [JVMCI] ResolvedJavaType.resolveMethod fails in fastdebug when invoked with a constructor

[Doug Simon]

This change prevents a call to `CompilerToVM.resolveMethod` with an argument representing constructor. Such a call
triggers an assertion in a fastdebug VM.

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Commit messages:
 - 8252881: [JVMCI] ResolvedJavaType.resolveMethod fails in fastdebug when invoked with a constructor

Changes: https://git.openjdk.java.net/jdk/pull/407/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=407&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8252881
  Stats: 5 lines in 1 file changed: 5 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/407.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/407/head:pull/407

PR: https://git.openjdk.java.net/jdk/pull/407