RFR: JDK-8267930: Refine code for loading hsdis library [v2]

[Hamlin Li]

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

Hamlin Li has updated the pull request incrementally with two additional commits since the last revision:

 - refine code
 - refine code

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/4260/files
  - new: https://git.openjdk.java.net/jdk/pull/4260/files/fa902ead..59dbbaae

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=4260&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=4260&range=00-01

  Stats: 7 lines in 2 files changed: 0 ins; 0 del; 7 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