RFR: JDK-8193060 Set MAKE env variable in jib profile for gnumake

[Tim Bell]

Magnus:

> A small addition to jib-profiles.js to set the MAKE environment variable
> for gnumake. (Used when running tests without configure)
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8193060
> WebRev:
> http://cr.openjdk.java.net/~ihse/JDK-8193060-set-MAKE-env-in-jib-profile/webrev.01

Looks good.

/Tim