[8] RFA 8203845: backport of JDK-8034788 inadvertently rolled back JDK-8187045 changes to toolchain.m4

[Rob McKenna]

Approved.

    -Rob

On 31/05/18 01:20, David Buck wrote:
> Hi!
> 
> Please approve the push of this simple regression fix to 8u-dev. As this is
> an issue in only JDK 8, there is no fix needed for later versions.
> 
> bug report:
> https://bugs.openjdk.java.net/browse/JDK-8203845
> 
> webrev:
> http://cr.openjdk.java.net/~dbuck/8203845.0/
> 
> code review:
> http://mail.openjdk.java.net/pipermail/build-dev/2018-May/022223.html
> 
> JPRT hostspot tests passed and manual confirmation of fix done.
> 
> Cheers,
> -Buck