RFR: 8295417: Pass $AR to binutils cross-build

[Aleksey Shipilev]

On Mon, 17 Oct 2022 15:46:11 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> 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
> ...

@magicus  -- you good with this?

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