This MR implements some functions from EXT_dsa:
- 1st commit: adds the missing NamedBuffer functions. With this change the 9 NamedBuffer functions of the spec are all implemented.
- 2nd commit: adds the 10 Framebuffer functions from the spec
- 3rd commit: adds EnableClientStateiEXT/DisableClientStateiEXT (and their aliases *ClientStateIndexedEXT)
- 4th commit: adds the 4 "indexed generic queries" from the spec
With all these changes applied:
- no regression on piglit
- 34 tests are fixed (when using MESA_EXTENSION_OVERRIDE="GL_EXT_direct_state_access")