[bugfix] Distribute and install git-whitespace-hook.

git-whitespace-hook is called by dune-control which barks if
it is not available. Therefore we distribute and install after
this patch.

bin/CMakeLists.txt

@@ -3,6 +3,7 @@ install(PROGRAMS
 	dunedoxynize
 	duneproject
 	dunecontrol
+	git-whitespace-hook
 	mpi-config
 	dune-autogen
 	DESTINATION ${CMAKE_INSTALL_BINDIR})

bin/Makefile.am

@@ -3,10 +3,12 @@
 # put scripts into dist-tarball
 EXTRA_DIST = am2cmake.py CMakeLists.txt duneproject dunecontrol \
   dunedoxynize \
+  git-whitespace-hook \
   mpi-config dune-autogen \
   xfail-compile-tests
 
 # ... and install some
-bin_SCRIPTS = am2cmake.py dunedoxynize duneproject dunecontrol mpi-config dune-autogen
+bin_SCRIPTS = am2cmake.py dunedoxynize duneproject dunecontrol mpi-config dune-autogen \
+  git-whitespace-hook
 
 include $(top_srcdir)/am/global-rules