ELF, MAINTAINERS: specifically mention ELF

People complain when I miss people in Cc.

[ kees: Also add the ELF uapi doc link ]
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Link: https://lore.kernel.org/r/2cb0891e-d7c0-4939-bb5f-282812de6078@p183Signed-off-by: Kees Cook <keescook@chromium.org>

MAINTAINERS

@@ -7955,12 +7955,13 @@ L:	rust-for-linux@vger.kernel.org
 S:	Maintained
 F:	rust/kernel/net/phy.rs
 
-EXEC & BINFMT API
+EXEC & BINFMT API, ELF
 R:	Eric Biederman <ebiederm@xmission.com>
 R:	Kees Cook <keescook@chromium.org>
 L:	linux-mm@kvack.org
 S:	Supported
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/execve
+F:	Documentation/userspace-api/ELF.rst
 F:	fs/*binfmt_*.c
 F:	fs/exec.c
 F:	include/linux/binfmts.h