partly reverse r3755: tools need the cuda CFLAGS to be able to include cuda.h

tools/Makefile.am

@@ -16,6 +16,7 @@
 
 SUBDIRS =
 
+AM_CFLAGS = $(HWLOC_CFLAGS) $(STARPU_CUDA_CPPFLAGS) $(STARPU_OPENCL_CPPFLAGS)
 LIBS = $(top_builddir)/src/libstarpu.la @LIBS@
 AM_CPPFLAGS = -I$(top_srcdir)/include/ -I$(top_srcdir)/tools/ -I$(top_srcdir)/mpi/ -I$(top_builddir)/src -I$(top_srcdir)/src