gnu: ghc@8.0: Remove obsolete patch.

* gnu/packages/patches/ghc-dont-pass-linker-flags-via-response-files.patch:
Delete file.
* gnu/local.mk (dist_patch_DATA): Adjust accordingly.
* gnu/packages/haskell.scm (ghc-8.0)[source](patches): Remove it.

gnu/local.mk

@@ -932,7 +932,6 @@ dist_patch_DATA =						\
   %D%/packages/patches/geoclue-config.patch			\
   %D%/packages/patches/ghc-8.0-fall-back-to-madv_dontneed.patch	\
   %D%/packages/patches/ghc-testsuite-dlopen-pie.patch		\
-  %D%/packages/patches/ghc-dont-pass-linker-flags-via-response-files.patch	\
   %D%/packages/patches/ghc-diff-swap-cover-args.patch		\
   %D%/packages/patches/ghc-haddock-api-fix-haddock.patch	\
   %D%/packages/patches/ghc-hpack-fix-tests.patch		\

gnu/packages/haskell.scm

@@ -320,9 +320,7 @@ (define-public ghc-8.0
       (sha256
        (base32 "1c8qc4fhkycynk4g1f9hvk53dj6a1vvqi6bklqznns6hw59m8qhi"))
       (patches
-       (search-patches
-        "ghc-dont-pass-linker-flags-via-response-files.patch"
-        "ghc-8.0-fall-back-to-madv_dontneed.patch"))))
+       (search-patches "ghc-8.0-fall-back-to-madv_dontneed.patch"))))
     (build-system gnu-build-system)
     (supported-systems '("i686-linux" "x86_64-linux"))
     (outputs '("out" "doc"))

gnu/packages/patches/ghc-dont-pass-linker-flags-via-response-files.patch

@@ -1,27 +0,0 @@
-Don’t add linker flags via ‘response files’ since ld-wrapper
-doesn’t handle them.
-See https://github.com/NixOS/nixpkgs/commit/a421e7bd4a28c69bded8b17888325e31554f61a1
-https://gcc.gnu.org/ml/gcc/2016-10/msg00151.html
-
-diff --git a/compiler/main/SysTools.hs.orig b/compiler/main/SysTools.hs
-index 1ab5b13..99270fc 100644
---- a/compiler/main/SysTools.hs.orig
-+++ b/compiler/main/SysTools.hs
-@@ -424,7 +424,7 @@ runCc dflags args =   do
-       args1 = map Option (getOpts dflags opt_c)
-       args2 = args0 ++ args1 ++ args
-   mb_env <- getGccEnv args2
--  runSomethingResponseFile dflags cc_filter "C Compiler" p args2 mb_env
-+  runSomethingFiltered dflags cc_filter "C Compiler" p args2 mb_env
-  where
-   -- discard some harmless warnings from gcc that we can't turn off
-   cc_filter = unlines . doFilter . lines
-@@ -945,7 +945,7 @@ runLink dflags args = do
-       args1     = map Option (getOpts dflags opt_l)
-       args2     = args0 ++ linkargs ++ args1 ++ args
-   mb_env <- getGccEnv args2
--  runSomethingResponseFile dflags ld_filter "Linker" p args2 mb_env
-+  runSomethingFiltered dflags ld_filter "Linker" p args2 mb_env
-   where
-     ld_filter = case (platformOS (targetPlatform dflags)) of
-                   OSSolaris2 -> sunos_ld_filter