Add test for data files in inplace dependencies

cabal-testsuite/PackageTests/NewBuild/CmdRun/Datafiles/bar/Main.hs

+import LibFoo
+
+main = putStrLn =<< LibFoo.getData
+

cabal-testsuite/PackageTests/NewBuild/CmdRun/Datafiles/bar/bar.cabal

+name: bar
+version: 1.0
+build-type: Simple
+cabal-version: >= 1.10
+
+executable bar
+    main-is: Main.hs
+    build-depends: base, foo
+    default-language: Haskell2010

cabal-testsuite/PackageTests/NewBuild/CmdRun/Datafiles/cabal.out

@@ -6,3 +6,14 @@ In order, the following will be built:
 Configuring executable 'foo' for foo-1.0..
 Preprocessing executable 'foo' for foo-1.0..
 Building executable 'foo' for foo-1.0..
+# cabal new-run
+Build profile: -w ghc-<GHCVER> -O1
+In order, the following will be built:
+ - foo-1.0 (lib) (first run)
+ - bar-1.0 (exe:bar) (first run)
+Configuring library for foo-1.0..
+Preprocessing library for foo-1.0..
+Building library for foo-1.0..
+Configuring executable 'bar' for bar-1.0..
+Preprocessing executable 'bar' for bar-1.0..
+Building executable 'bar' for bar-1.0..

cabal-testsuite/PackageTests/NewBuild/CmdRun/Datafiles/cabal.project

-packages: foo
+packages:
+  foo
+  bar

cabal-testsuite/PackageTests/NewBuild/CmdRun/Datafiles/cabal.test.hs

 import Test.Cabal.Prelude
-main = cabalTest $
+main = cabalTest $ do
     cabal' "new-run" ["foo"] >>= assertOutputContains "Hello World"
+    cabal' "new-run" ["bar"] >>= assertOutputContains "Hello World"
 

cabal-testsuite/PackageTests/NewBuild/CmdRun/Datafiles/foo/LibFoo.hs

+module LibFoo where
+import Paths_foo
+getData = readFile =<< getDataFileName "hello.txt"
+

cabal-testsuite/PackageTests/NewBuild/CmdRun/Datafiles/foo/foo.cabal

@@ -9,3 +9,11 @@ executable foo
     main-is: Main.hs
     build-depends: base
     default-language: Haskell2010
+
+library
+    exposed-modules: LibFoo
+    other-modules: Paths_foo
+    build-depends: base
+    default-language: Haskell2010
+
+