Use capi for syscalls that break under musl's handling of 64-bit time_t

Closes #145.

System/Directory/Internal/C_utimensat.hsc

+{-# LANGUAGE CApiFFI #-}
+
 module System.Directory.Internal.C_utimensat where
 #include <HsDirectoryConfig.h>
 #ifdef HAVE_UTIMENSAT
@@ -41,7 +43,7 @@ toCTimeSpec t = CTimeSpec (CTime sec) (truncate $ 10 ^ (9 :: Int) * frac)
     (sec,  frac)  = if frac' < 0 then (sec' - 1, frac' + 1) else (sec', frac')
     (sec', frac') = properFraction (toRational t)
 
-foreign import ccall "utimensat" c_utimensat
+foreign import capi "sys/stat.h utimensat" c_utimensat
   :: CInt -> CString -> Ptr CTimeSpec -> CInt -> IO CInt
 
 #endif

changelog.md

 Changelog for the [`directory`][1] package
 ==========================================
 
+  * Use CApiFFI for utimensat.
+    ([#145](https://github.com/haskell/directory/pull/145))
+
 ## 1.3.8.0 (Sep 2022)
 
   * Drop support for `base` older than 4.11.0.

directory.cabal

@@ -36,7 +36,7 @@ source-repository head
 
 Library
     default-language: Haskell2010
-    other-extensions: CPP
+    other-extensions: CApiFFI, CPP
 
     exposed-modules:
         System.Directory