allow env variable to set ICU locale

git-svn-id: https://svn.r-project.org/R/trunk@66196 00db46b3-68df-0310-9c12-caf00c1e9a41
update

git-svn-id: https://svn.r-project.org/R/trunk@66198 00db46b3-68df-0310-9c12-caf00c1e9a41
The ftype veriable in bcEval was not being maintained properly; the
code was modified to eliminate the need for this variable.


git-svn-id: https://svn.r-project.org/R/trunk@66199 00db46b3-68df-0310-9c12-caf00c1e9a41