Log Message:
libX11: update to 1.8.12.

This release includes:
 * x11.pc: Add URL field (!280)
 * xkb: Bring over fixes from Xserver to shared XKB source files (!279)

Alan Coopersmith (5):
      x11.pc: Add URL field
      XkbFreeKeyboard: set xkb->geom to NULL after freeing it
      XkbChangeTypesOfKey: verify newTypesIn is not null before using it
      xkb: always set *mask_rtrn in XkbVirtualModsToReal
      libX11 1.8.12

Daniel Stone (1):
      XKB: Fix size_syms calculation bug

Olivier Fourdan (1):
      xkb: Fix buffer overflow in XkbChangeTypesOfKey()

Siddhesh Poyarekar (1):
      xkb: Allocate size_syms correctly when width of a type increases