Mark inline function in_word_set(str, len) as static.
The function uses a static variable (stringpool_contents)
and this is not allowed in an inline function with external linkage.

This change in
xsrc/external/mit/xorg/lib/xcb-util/atom/atoms.c
is identical to a recent change in
src/external/mit/xorg/lib/xcb-util/atom/atoms.c
where the problem was found by clang -Wstatic-in-inline.

Fix memset usage

Make xcb_icccm.h use the same type as icccm.c for win_gravity parameter,
fixes build with PCC which does not use "unsigned int" for enum type

from upstream:

http://cgit.freedesktop.org/xcb/util-old/commit/?id=155c99470961b38ed090ef1b4767c87ec1042386

initial import of xcb-util-0.3.6