[VDPAU] Exporting the flash workaround functions

[Emil Velikov]

Hi all,

Just noticed that a few functions are non-static, thus in some cases we end up
exporting them.

libvdpau:
_vdp_DRI2Connect
_vdp_DRI2QueryExtension
_vdp_DRI2QueryVersion
_vdp_DRI2RemoveExtension

libvdpau_trace:
_vdp_cap_init_planes_adapt_surface_video
_vdp_cap_init_planes_adapt_surface_bitmap
_vdp_cap_init_planes_adapt_surface_output

AFAICS the former ones cannot be annotated as static, although we can add the
appropriate compiler attributes, while the latter are most likely just missed
out in the orignal codedump. Are any of the above intended to be exported ?

Cheers
Emil