cbc090bfe3
[1] Add "compiles" argument to cran to allow R-cran ports need to compile code to bring in the correct compiler dependencies. Also, ensure consistency between the compiler selected by the R port and the R-cran ports. [2] Migrate R-cran ports that manually specify the compiler to USES=cran,compiles. PR: 210343 Approved by: wen (1), portmgr (2, blanket)