[PATCH] Add reference_init.pl to `make buildcheck' target

[PATCH] Add reference_init.pl to `make buildcheck' target

`make buildcheck' only checks for calls to linker discarded sections,

reference_init checks for calls to sections discarded at run time, init was
cloned from discarded.  They are separate because the linker detects the
discarded case and I did not want to confuse users with messages about init
text/data while they were fixing the linker errors.

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>