RFR: 8295417: Pass $AR to binutils cross-build [v2]

[Aleksey Shipilev]

> While adapting my CI to build hsdis automatically, I realized that sometimes we miss the proper $AR for binutils cross-build. Configure would then fail like:
> 
> 
> $ CXX=aarch64-linux-gnu-g++ CC=aarch64-linux-gnu-gcc sh ./configure --with-debug-level=fastdebug --openjdk-target=aarch64-linux-gnu --with-sysroot=/chroots/arm64 --with-boot-jdk=/home/shade/Install/jdk19u-ea --with-hsdis=binutils --with-binutils-src=binutils-2.38
> ...

Aleksey Shipilev has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:

 - Merge branch 'master' into JDK-8295417-hsdis-ar
 - Fix

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/10729/files
  - new: https://git.openjdk.org/jdk/pull/10729/files/65291606..ed1b26af

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10729&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10729&range=00-01

  Stats: 5518 lines in 636 files changed: 2705 ins; 1089 del; 1724 mod
  Patch: https://git.openjdk.org/jdk/pull/10729.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10729/head:pull/10729

PR: https://git.openjdk.org/jdk/pull/10729