add compiler-check for __attribute__ ((deprecated))

[[Imported from SVN: r1127]]

m4/dune_all.m4

@@ -13,6 +13,7 @@ dnl check for programs
   AC_REQUIRE([AC_PROG_CXX])
   AC_REQUIRE([AC_PROG_CPP])
   AC_REQUIRE([DUNE_CHECK_COMPILER])
+  AC_REQUIRE([DUNE_CHECKDEPRECATED])
   AC_REQUIRE([AC_PROG_INSTALL])
   AC_REQUIRE([AC_PROG_LN_S])
   AC_REQUIRE([AC_PROG_MAKE_SET])