[code-reflection] Integrated: Missed a project rename in hat/bld.java

[Gary Frost]

Whoops.  I missed the rename of extraction artifacts in bld.java

This is the fix

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Commit messages:
 - Missed a project rename in hat/bld.java

Changes: https://git.openjdk.org/babylon/pull/485/files
  Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=485&range=00
  Stats: 4 lines in 1 file changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/babylon/pull/485.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/485/head:pull/485

PR: https://git.openjdk.org/babylon/pull/485