Increment the "current" version info for sync, xinput and xkb

Increment the "current" version info for sync, xinput and xkb

Sync: Due to commit e6a246e50e62cbcba3 "sync: Change value list param of
CreateAlarm and ChangeAlarm into switch", various symbols disappeared,
for example xcb_sync_{change,create}_alarm_sizeof.

xinput: This extension was updated from version 1.4 to 2.3. This means
that lots of new things are generated. However, this change is
backwards-compatible and thus age gets set to 1.

xkb: In commit 37d0f55392d6 "xkb: Work around alignment problems in
GetNames and GetMap replies", some padding fields were introduced into
structures for which an _unpack() function is generated. This changed
the size of the struct and caused offsets into this struct to change.

https://bugs.freedesktop.org/show_bug.cgi?id=71507

Signed-off-by: Uli Schlachter <psychon@znc.in>
Signed-off-by: Julien Cristau <jcristau@debian.org>