[MINOR][SPARKR] Verbose build comment in WINDOWS.md rather than promoting...

[MINOR][SPARKR] Verbose build comment in WINDOWS.md rather than promoting default build without Hive

## What changes were proposed in this pull request?

This PR fixes `WINDOWS.md` to imply referring other profiles in http://spark.apache.org/docs/latest/building-spark.html#building-with-buildmvn rather than directly pointing to run `mvn -DskipTests -Psparkr package` without Hive supports.

## How was this patch tested?

Manually,

<img width="626" alt="2016-08-31 6 01 08" src="https://cloud.githubusercontent.com/assets/6477701/18122549/f6297b2c-6fa4-11e6-9b5e-fd4347355d87.png">

Author: hyukjinkwon <gurwls223@gmail.com>

Closes #14890 from HyukjinKwon/minor-build-r.