make dist should always copy codelet source files

examples/Makefile.am

@@ -41,15 +41,11 @@ EXTRA_DIST = 					\
 	lu/xlu_implicit.c			\
 	lu/xlu_implicit_pivot.c			\
 	lu/xlu_kernels.c			\
-	lu/lu_example.c
-
-if STARPU_USE_OPENCL
-EXTRA_DIST += 					\
+	lu/lu_example.c				\
 	incrementer/incrementer_kernels_opencl_codelet.cl 	\
 	variable/variable_kernels_opencl_codelet.cl		\
 	matvecmult/matvecmult_kernel.cl				\
 	block/block_kernel.cl
-endif
 
 CLEANFILES = 					\
 	gordon/null_kernel_gordon.spuelf	\