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

[Magnus Ihse Bursie]

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

/Magnus