RFR: 8204541: Correctly support AIX xlC 16.1 symbol visibility flags [v2]

[Ichiroh Takiguchi]

> This change is just for AIX platform with IBM XL C/C++ 16.1.
> By this change, lib's entry points are reduced by compilation and linkage option changes.
> 
> Without changes:
> 
> $ dump -X32_64 -Tv lib/libawt.so | grep EXP | wc
> 914
> 
> With changes
> 
> $ dump -X32_64 -Tv lib/libawt.so | grep EXP | wc
> 142

Ichiroh Takiguchi has updated the pull request incrementally with one additional commit since the last revision:

  Remove unexpected comment

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7862/files
  - new: https://git.openjdk.java.net/jdk/pull/7862/files/a4c73abb..4b383aeb

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7862&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7862&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7862.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7862/head:pull/7862

PR: https://git.openjdk.java.net/jdk/pull/7862