When trying to pass in RTS options to GHC via ghc-options in stack.yaml, the RTS options aren't properly threaded through.

Steps to reproduce

1. Create a new project via stack new
2. Add the following to stack.yaml

ghc-options:
  "$locals": +RTS -s -RTS

3. Run command stack build.

Expected

The RTS options are passed to GHC, and the statistics are printed out while compiling.

Actual

Cabal-simple_mPHDZzAJ_2.4.0.1_ghc-8.6.5: unknown RTS option: --ghc-options

Stack version

$ stack --version
Version 2.1.3 x86_64

Method of installation

• Official binary, downloaded from stackage.org or fpcomplete's package repository