tools include: Add compiler.h to list.h

list.h needs WRITE_ONCE() since 7f5f873 ("rculist: Use WRITE_ONCE()
when deleting from reader-visible list") add it before including the
kernel's list.h file.

This fixes builds of 'make perf-tar-src-pkg' perf tool tarball builds,
i.e. out of tree builds.

Cc: Adrian Hunter <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Wang Nan <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

tools/include/linux/list.h

@@ -1,3 +1,4 @@
+#include <linux/compiler.h>
 #include <linux/kernel.h>
 #include <linux/types.h>