(math/R) Updated 4.6.0 to 4.6.1, build with clang still fails

Changes in R 4.6.1:

  New Features:

         * The LaTeX class 'jss' bundled in
           'share/texmf/tex/latex/jss.cls' has been updated to work
           with 'hyperref' version 7.01q (2026/04/24).

         * Plain-text (and legacy HTML) conversion for a simple Rd
           \eqn{} now handles \geq, \leq, \neq and \ne in addition to
           \ge and \le (PR#19070).

  Bug Fixes:

         * 'abbreviate(<non-ASCII>)' now works better, using
           'iswlower()' and '*upper()' to treat "wide" characters,
           thanks to Kevin's PR#19058.

         * 'cut(1:11, {})' now signals an error for the invalid
           'breaks', fixing PR#19057, thanks to Kevin Ushey.

         * 'all(<symbol>)' signals an error now, as some similar
           coercions; previously, the coercion of the symbol resulted
           in 'NULL' internally, raised a warning, and could access
           illegal memory; thanks to Kevin Ushey's PR#19054.

         * 'stl()' now checks its 3 x 3 tuning parameters on the R
           level; 'stl(*, s.window = 0)' now "works" instead dumping
           core, 'stl(*, s.window = 1)' "works" correctly, too.  Also,
           the 'summary()' method mentions the robustness 'weights'
           only if any robustness iterations happened.

           Further, 'stl()' is now based on C code, translated from
           previous Fortran, triggered by a flang 22 compiler
           optimization bug ('-O2').

         * The border case 'zapsmall(x, digits=Inf)' where 'x' contains
           an 'Inf' entry no longer returns all 'NaN' but rather 'x'.
           The improved help page now has more non-default examples.

         * 'wilcox.test(x, exact=FALSE, correct = k)''s p-value
           computation got a missing 'dnorm(z)' factor, and so did the
           2-sample case, in addition to more fixes.

         * The data part of 'getGenerics()' listed package names for
           generic functions defined in more than one package.  Now it
           lists generic function names, as intended.  Thanks to
           Michael Chirico for report and patch proposal (PR#19080).

         * Overly long 'dyn.load()' error messages (C level
           'dlerror()'), should no longer corrupt its state, thanks to
           Ivan Krylov's PR#19029 report and patch.

         * 'as.matrix(<POSIXlt>)' again produces a _numeric_ matrix,
           and the 'c()' and subassignment methods for 'POSIXlt'
           objects work correctly more often, e.g., without a '"tzone"'
           attribute, back porting a few of the PR#18989 fixes from
           R-devel, both thanks to Suharto Anggono.

         * In 'methods', 'as()' now correctly coerces S4 objects to S4
           superclasses extending old-style classes, instead of
           returning only the S3 part.
