[Driver] Print a newline when invoking `-print-resource-dir`
[Driver] Print a newline when invoking `-print-resource-dir`

The commit yesterday (r299473) to add the `-print-resource-dir`
option was supposed to emit a newline after the resource dir.

Differential Revision: https://reviews.llvm.org/D31447

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@299597 91177308-0d34-0410-b5e6-96231b3b80d8

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