[SPARK-6855] [SPARKR] Set R includes to get the right collate order.

[shivaram]

This prevents tools like devtools::document creating invalid collate orders

[shivaram]

cc @cafreeman@davies

[cafreeman]

You may want to pull in the schema changes from earlier today since SQLtypes.R was replaced with schema.R

[SparkQA]

Test build #30058 has finished for PR 5462 at commit f3db562.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.
• This patch does not change any dependencies.

[shivaram]

@cafreeman We will pull that change in #5436 and @davies will take care of merging it correctly.

[davies]

LGTM.

@shivaram Could you merge this today? then I can rebase #5436

[SparkQA]

Test build #684 has finished for PR 5462 at commit f3db562.

• This patch fails MiMa tests.
• This patch merges cleanly.
• This patch adds no public classes.
• This patch does not change any dependencies.

[shivaram]

Thanks @davies - I don't think the error has anything to do with this PR, but let me retest it anyways to be safe

Jenkins, retest this please

[SparkQA]

Test build #686 has finished for PR 5462 at commit f3db562.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.
• This patch does not change any dependencies.