RFR: JDK-8267930: Refine code for loading hsdis library [v3]

[Hamlin Li]

> code for loading hsdis library is redundant, this is to simplify it.

Hamlin Li has updated the pull request incrementally with one additional commit since the last revision:

  fix typo

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/4260/files
  - new: https://git.openjdk.java.net/jdk/pull/4260/files/59dbbaae..84ff400a

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=4260&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=4260&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4260.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4260/head:pull/4260

PR: https://git.openjdk.java.net/jdk/pull/4260