(cabal check) Add "Autogen include" test for bm

All in `autogen-includes` hs to be in either `includes` or
`install-includes` (benchmark).

Author: ffaf1

cabal-testsuite/PackageTests/Check/ConfiguredPackage/Sanity/AutogenIncludesBenchmark/cabal.out

@@ -0,0 +1,4 @@
+# cabal check
+Warning: The package will not build sanely due to these errors:
+Warning: An include in 'autogen-includes' is not in 'includes'.
+Warning: Hackage would reject this package.

cabal-testsuite/PackageTests/Check/ConfiguredPackage/Sanity/AutogenIncludesBenchmark/cabal.test.hs

@@ -0,0 +1,6 @@
+import Test.Cabal.Prelude
+
+-- All `autogen-includes` should appear in `install-includes` or
+-- `includes` (benchmark).
+main = cabalTest $
+  fails $ cabal "check" []

cabal-testsuite/PackageTests/Check/ConfiguredPackage/Sanity/AutogenIncludesBenchmark/pkg.cabal

@@ -0,0 +1,14 @@
+cabal-version: 3.0
+name: pkg
+synopsis: synopsis
+description: description
+version: 0
+category: example
+maintainer: [email protected]
+license: GPL-3.0-or-later
+
+benchmark benchmark
+  main-is: Main.hs
+  autogen-includes: AutoGenInc
+  default-language: Haskell2010
+  type: exitcode-stdio-1.0