[Piglit] [PATCH 0/10] rename some tests

[Brian Paul]

The names of many piglit tests are pretty inconsistent.

Nowadays, most tests get put in a tests/spec/arb_foo_bar/ directory and 
the executables are prefixed with "arb_foo_bar-*".  But older tests 
don't really follow any pattern.  Many were just dumped in tests/general/

I'd like to clean up some of this.  This first patch series addresses 
tests related to instanced drawing and GL_ARB_draw_elements_base_vertex.

-Brian