Adding upstream version 2:9.1.1230.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

runtime/compiler/stack.vim

@@ -0,0 +1,37 @@
+" Vim compiler file
+" Compiler:         Haskell Stack
+" Maintainer:       Daniel Campoverde <alx@sillybytes.net>
+" Latest Revision:  2018-08-27
+
+if exists("current_compiler")
+  finish
+endif
+let current_compiler = "stack"
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+
+CompilerSet errorformat=
+    \%-G%.%#:\ build\ %.%#,
+    \%-G%.%#:\ configure\ %.%#,
+    \%-G[%.%#]%.%#,
+    \%-G%.%#preprocessing\ %.%#,
+    \%-G%.%#configuring\ %.%#,
+    \%-G%.%#building\ %.%#,
+    \%-G%.%#linking\ %.%#,
+    \%-G%.%#installing\ %.%#,
+    \%-G%.%#registering\ %.%#,
+    \%-G%.%#:\ copy/register%.%#,
+    \%-G%.%#process\ exited\ %.%#,
+    \%-G%.%#--builddir=%.%#,
+    \%-G--%.%#,
+    \%-G%.%#\|%.%#,
+    \%E%f:%l:%c:\ error:,%+Z\ \ \ \ %m,
+    \%E%f:%l:%c:\ error:\ %m,%-Z,
+    \%W%f:%l:%c:\ warning:,%+Z\ \ \ \ %m,
+    \%W%f:%l:%c:\ warning:\ %m,%-Z,
+
+
+let &cpo = s:cpo_save
+unlet s:cpo_save