gallium: trace: Add missing fence related wrappers

gallium: trace: Add missing fence related wrappers

Without that kmscube with GALLIUM_TRACE would segfault like:

  #0  0x0000000000000000 in  ()
  #1  0x0000ffff8f311760 in dri2_create_fence_fd (_ctx=0xaaaae266b8b0, fd=10) at ../src/gallium/state_trackers/dri/dri_helpers.c:122
  #2  0x0000ffff90788670 in dri2_create_sync (drv=0xaaaae2667910, disp=0xaaaae26691f0, type=12612, attrib_list=0xaaaae26b9290) at ../src/egl/drivers/dri2/egl_dri2.c:2993
  #3  0x0000ffff90776a9c in _eglCreateSync (disp=0xaaaae26691f0, type=12612, attrib_list=0xaaaae26b9290, orig_is_EGLAttrib=0, invalid_type_error=12292) at ../src/egl/main/eglapi.c:1823
  #4  0x0000ffff90776be4 in eglCreateSyncKHR (dpy=0xaaaae26691f0, type=12612, int_list=0xfffff662e828) at ../src/egl/main/eglapi.c:1848

Signed-off-by: Guido Günther <agx@sigxcpu.org>
Signed-off-by: Marek Olšák <marek.olsak@amd.com>