sparse: add no_sanitize_address as an ignored attribute

Add attribute "no_sanitize_address" or "__no_sanitize_address__" as an ignored
attribute. Fixes this sparse warning:

include/linux/compiler.h:232:8: error: attribute 'no_sanitize_address': unknown attribute

Also add test case for 'no_sanitize_address': validation/attr-no_sanitize_address.c.
'make check' says for this test case:
    TEST     attribute no_sanitize_address (attr-no_sanitize_address.c)

Signed-off-by: Rui Teng <rui.teng@linux.vnet.ibm.com>
Signed-off-by: Christopher Li <sparse@chrisli.org>
2 files changed