Add files to be installed

examples/Makefile.am

@@ -297,6 +297,7 @@ examplebin_PROGRAMS += 				\
 
 lu_lu_implicit_example_float_SOURCES =		\
 	lu/lu_example_float.c			\
+	lu/xlu_implicit.c			\
 	lu/slu_implicit.c			\
 	lu/slu_implicit_pivot.c			\
 	lu/slu_kernels.c			\