RFR: JDK-8010767: Build fails on OEL6 with 16 cores

[Erik Joelsson]

Hello,

Please review this backport from jdk9 to jdk8u. The problem of hotspot 
ergonomics wrecking havoc in the build on very large machines is hitting 
us in jdk8u builds too, when running bootcycle-images. This patch 
introduces two versions of the JAVA_FLAGS from configure, one for large 
java instances and one for small and forces serialgc on the small 
configuration so that machine resources are conserved.

Bug: https://bugs.openjdk.java.net/browse/JDK-8010767
Webrev: http://cr.openjdk.java.net/~erikj/8010767/webrev.jdk8u.01/
Original jdk9 review thread: 
http://mail.openjdk.java.net/pipermail/build-dev/2014-March/012112.html


/Erik