Update our copy of libcap.

Merge commit 'dce069b6':

dce069b6 Add something to run libcap's quicktest tests against development kernel.
1f52c8a5 Fix tyop in a comment.
a0b240a1 Up the minor release number.
9c3d89fb Update to Linus' kernel tree uapi headers.
b2457194 Delete unused #define (magit numbers from <linux/xattr.h>)
1bebacbd setcap: fix errno display
ebcbf9f9 ignore the place I stage user contributed patches for import.
22579a76 Sigh. Compiling capsh statically and we get no getpw*() functions.
85f38a57 Drop use of libattr for our trivial use case of kernel API.

Bug: 32613279
Test: Build HiKey, everything boots.
Change-Id: Id002306c0d28fbc12bd6a409870fb97a8068ff24