RFR: 8345744: Use C++ LINK_TYPE with SetupBuildLauncher in StaticLibs.gmk [v2]

[Jiangli Zhou]

> Please review following fix for linking static JDK launcher, thanks.
> 
> - Set LINK_TYPE to C++ when building the static launcher to make sure LDCXX instead of LD is used for linking.
> 
> - Remove -l:libstdc++. For linux, -static-libstdc++ is already set in STATIC_STDCXX_FLAGS. See https://github.com/openjdk/jdk/blob/e0d639878346946d0627a57b0eeb0cac8ca533fc/make/autoconf/lib-std.m4#L50.
> 
> See more details in https://bugs.openjdk.org/browse/JDK-8345744.

Jiangli Zhou has updated the pull request incrementally with one additional commit since the last revision:

  Remove -lstdc++ and STANDARD_LIBS, based on magicus' comment.

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/22624/files
  - new: https://git.openjdk.org/jdk/pull/22624/files/2012cbe7..81e5c8b2

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=22624&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=22624&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/22624.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22624/head:pull/22624

PR: https://git.openjdk.org/jdk/pull/22624