ARROW-5373: [Java] Add missing details for Gandiva Java Build
ARROW-5373: [Java] Add missing details for Gandiva Java Build

Author: daslu <daniel.slutsky@gmail.com>

Closes #4345 from daslu/master and squashes the following commits:

536f6451 <daslu> added missing compilation flag in docs

xhochy/arrow,apache/arrow,apache/arrow,majetideepak/arrow,renesugar/arrow,renesugar/arrow,kou/arrow,xhochy/arrow,xhochy/arrow,kou/arrow,laurentgo/arrow,icexelloss/arrow,apache/arrow,laurentgo/arrow,wesm/arrow,majetideepak/arrow,kou/arrow,icexelloss/arrow,icexelloss/arrow,kou/arrow,renesugar/arrow,apache/arrow,icexelloss/arrow,icexelloss/arrow,cpcloud/arrow,xhochy/arrow,cpcloud/arrow,cpcloud/arrow,apache/arrow,cpcloud/arrow,renesugar/arrow,cpcloud/arrow,wesm/arrow,majetideepak/arrow,majetideepak/arrow,wesm/arrow,xhochy/arrow,renesugar/arrow,xhochy/arrow,kou/arrow,cpcloud/arrow,wesm/arrow,kou/arrow,laurentgo/arrow,laurentgo/arrow,laurentgo/arrow,apache/arrow,renesugar/arrow,xhochy/arrow,majetideepak/arrow,wesm/arrow,icexelloss/arrow,cpcloud/arrow,laurentgo/arrow,wesm/arrow,majetideepak/arrow,majetideepak/arrow,xhochy/arrow,xhochy/arrow,laurentgo/arrow,cpcloud/arrow,kou/arrow,apache/arrow,icexelloss/arrow,icexelloss/arrow,wesm/arrow,xhochy/arrow,apache/arrow,icexelloss/arrow,icexelloss/arrow,renesugar/arrow,kou/arrow,apache/arrow,apache/arrow,kou/arrow,laurentgo/arrow,laurentgo/arrow,laurentgo/arrow,icexelloss/arrow,majetideepak/arrow,icexelloss/arrow,kou/arrow,majetideepak/arrow,kou/arrow,majetideepak/arrow,cpcloud/arrow,icexelloss/arrow,kou/arrow,laurentgo/arrow,cpcloud/arrow,xhochy/arrow,majetideepak/arrow,wesm/arrow,xhochy/arrow,apache/arrow,cpcloud/arrow,majetideepak/arrow,kou/arrow,xhochy/arrow,cpcloud/arrow,cpcloud/arrow,apache/arrow,wesm/arrow,majetideepak/arrow,laurentgo/arrow,wesm/arrow,wesm/arrow,laurentgo/arrow,renesugar/arrow,laurentgo/arrow,renesugar/arrow,kou/arrow,cpcloud/arrow,apache/arrow,wesm/arrow,renesugar/arrow,xhochy/arrow,wesm/arrow,xhochy/arrow,renesugar/arrow,renesugar/arrow,apache/arrow,laurentgo/arrow,wesm/arrow,renesugar/arrow,renesugar/arrow,renesugar/arrow,majetideepak/arrow,majetideepak/arrow,icexelloss/arrow