RFR: 8374698: Stub names should look more like identifiers

[Aleksey Shipilev]

Noticed this when looking at disassembly. Cosmetic issue in [JDK-8360707](https://bugs.openjdk.org/browse/JDK-8360707) makes the stub identifiers look fairly weird:


0x0000786da3c1a6f2: call Stub::Stub Generator lookup_secondary_supers_table_slow_path_stub
    ; {runtime_call Stub::Stub Generator lookup_secondary_supers_table_slow_path_stub}


Notice "Stub Generator" in the middle of the stub identifier.

After the fix:


0x00007f357bc1a3f2:   call   Stub::lookup_secondary_supers_table_slow_path_stub (stub gen)
     ; {runtime_call Stub::lookup_secondary_supers_table_slow_path_stub (stub gen)}

-------------

Commit messages:
 - Fix

Changes: https://git.openjdk.org/jdk/pull/29080/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=29080&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8374698
  Stats: 10 lines in 1 file changed: 0 ins; 0 del; 10 mod
  Patch: https://git.openjdk.org/jdk/pull/29080.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29080/head:pull/29080

PR: https://git.openjdk.org/jdk/pull/29080