RFR: JDK-8199403 Require binutils 2.18 or newer

[Tim Bell]

On 03/09/18 06:37, Magnus Ihse Bursie wrote:
> We have several checks for the behavior of a very old GNU binutil linker. If we instead require at least version 2.18 of binutils, we can remove these checks.
>
> For consistency, I have also added extraction of the linker version to the other toolchains/platforms I have access to.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8199403
> WebRev: http://cr.openjdk.java.net/~ihse/JDK-8199403-require-binutils-2_18/webrev.01

Looks good.

/Tim