devel/RStudio: Update to 1.1.409 (also fixes building with boost 1.66)

The RStudio's upstream merged the boost fix into the master for FreeBSD.

Additionally, the comment is modified to reflect the new poudriere feature
MAX_FILES_${PKGBASE} that needs to be utilized to make this port build
in poudriere, since it opens more files than the default limit of 1024.

PR: 224827
Submitted by: myself
Reported by: jbeich
Approved by: adamw
Differential Revision: https://reviews.freebsd.org/D13748