RFR: 8259035: Comments for load order of hsdis should be updated

[Yasumasa Suenaga]

Load order for hsdis is described in both src/utils/hsdis/README and src/hotspot/share/compiler/disassembler.cpp. README has been updated in [JDK-8215977](https://bugs.openjdk.java.net/browse/JDK-8215977), however disassembler.cpp has not been updated yet.

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

Commit messages:
 - 8259035: Comments for load order of hsdis should be updated

Changes: https://git.openjdk.java.net/jdk/pull/1919/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1919&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8259035
  Stats: 7 lines in 1 file changed: 0 ins; 0 del; 7 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1919.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1919/head:pull/1919

PR: https://git.openjdk.java.net/jdk/pull/1919