Describe the bug

ormolu fails to run on files with CTYPE pragmas, e.g. (from the GHC docs):

data    {-# CTYPE "unistd.h" "useconds_t" #-} T

This produces the error:

Test2.hs
  AST of input and AST of formatted code differ.
    at Test2.hs:1:1-47
  Please, consider reporting the bug.

To Reproduce
Make a file that contains the above example and run ormolu on it.

Expected behavior
Ormolu should correctly format such files without errors.

Environment

• OS name + version: Debian 10 buster
• Version of the code:
  ormolu 0.1.4.1 UNKNOWN UNKNOWN
  using ghc-lib-parser 8.10.4.20210206