Add r-ellipsis

[anutosh491]

Depends on #1303

[IsabelParedes]

- Error in dyn.load(file, DLLpath = DLLpath, ...) : 
  unable to load shared object '$PREFIX/lib/R/library/rlang/libs/rlang.so':
  $PREFIX/lib/R/library/rlang/libs/rlang.so: invalid ELF header
  Calls: <Anonymous> ... namespaceImport -> loadNamespace -> library.dynam -> dyn.load
  Execution halted
- ERROR: lazy loading failed for package ‘ellipsis’

I'm working on a patch for r-base to fix this issue. This is because it tries to execute the R binary in the same build environment. This shows up on all the packages that depend on other R packages.

[IsabelParedes]

The patch works!

[IsabelParedes]

We don't need the build.sh anymore :)