[riscv-port-jdk11u:riscv-port] RFR: 8333261: [repo-riscv-port-11] sun/jvm/hotspot/debugger/risv64 should be riscv64

[SendaoYan]

Hi,
  The package name of `RISCV64ThreadContext.java` is `sun.jvm.hotspot.debugger.riscv64`, so the directory name of `RISCV64ThreadContext.java` shoule be `src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/debugger/riscv64`, rather than `src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/debugger/risv64`.

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Commit messages:
 - 8333261: [repo-riscv-port-11] sun/jvm/hotspot/debugger/risv64 should be riscv64

Changes: https://git.openjdk.org/riscv-port-jdk11u/pull/23/files
  Webrev: https://webrevs.openjdk.org/?repo=riscv-port-jdk11u&pr=23&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8333261
  Stats: 0 lines in 1 file changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/riscv-port-jdk11u/pull/23.diff
  Fetch: git fetch https://git.openjdk.org/riscv-port-jdk11u.git pull/23/head:pull/23

PR: https://git.openjdk.org/riscv-port-jdk11u/pull/23