zeppelin git commit: Add missing build dependencies.

[fe...@apache.org]

Repository: zeppelin
Updated Branches:
  refs/heads/master 4f95555ed -> acc1a7cfe


Add missing build dependencies.

Add `apt-get install` lines for R dependencies that are needed to build
successfully.

### What is this PR for?
This pull request adds installation instructions for building which relate to missing dependencies resulting in failing to build (if using R).

### What type of PR is it?
[Documentation]

Author: Jens Grassel <je...@wegtam.com>

Closes #2674 from jan0sch/docs-missing-build-deps and squashes the following commits:

aa581c1 [Jens Grassel] Add missing build dependencies.


Project: http://git-wip-us.apache.org/repos/asf/zeppelin/repo
Commit: http://git-wip-us.apache.org/repos/asf/zeppelin/commit/acc1a7cf
Tree: http://git-wip-us.apache.org/repos/asf/zeppelin/tree/acc1a7cf
Diff: http://git-wip-us.apache.org/repos/asf/zeppelin/diff/acc1a7cf

Branch: refs/heads/master
Commit: acc1a7cfe78d0d8f69eff68ebb8f5249977e2634
Parents: 4f95555
Author: Jens Grassel <je...@wegtam.com>
Authored: Thu Nov 16 12:09:35 2017 +0100
Committer: Felix Cheung <fe...@apache.org>
Committed: Sun Nov 26 16:00:22 2017 -0800

----------------------------------------------------------------------
 docs/setup/basics/how_to_build.md | 2 ++
 1 file changed, 2 insertions(+)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/zeppelin/blob/acc1a7cf/docs/setup/basics/how_to_build.md
----------------------------------------------------------------------
diff --git a/docs/setup/basics/how_to_build.md b/docs/setup/basics/how_to_build.md
index f5eb969..f78c631 100644
--- a/docs/setup/basics/how_to_build.md
+++ b/docs/setup/basics/how_to_build.md
@@ -254,6 +254,8 @@ sudo apt-get install git
 sudo apt-get install openjdk-7-jdk
 sudo apt-get install npm
 sudo apt-get install libfontconfig
+sudo apt-get install r-base-dev
+sudo apt-get install r-cran-evaluate
 ```