Update headers

Cherry-pick the following from sibling i686-linux-glibc2.7-4.6
to glibc2.15 level (Ubuntu 12.04)

update linux/capability.h e1d944b4b2ef55eaf9fc041cd589310adb7b1acb
update linux/xattr.h      360e7c65c8b2a4771a1d97cf0ef2d8bdc284ef67
add linux/securebits.h    0df991cec7f8b02e85050569e7127e341450c2ed
add sys/capability.h      38af6b6bef4e585e13d52713fddccfb17e5e9192

Change-Id: I9cc105816652ac1b11792698a6ab41a4d5978965
4 files changed