ldc 0.15.1

Closes #34993.
ldc: update 0.15.1 bottle.
purescript 0.6.1.2

PureScript is a small strongly typed programming language that compiles to
JavaScript.

See also:

  - http://www.reddit.com/r/purescript
  - http://www.purescript.org/
  - http://try.purescript.org/
Build purescript from source 0.6.1.2
purescript: read test input from a file
Explain why purescript fails with clang
purescript 0.6.2
purescript: add 0.6.2 bottle.