WIP, probably should abandon
Fixup varying-struct-basic
varying-struct-arrays
varying-struct-copy
framework: Move process_args call earlier in init sequence.

This allows tests to examine argc and argv in between
PIGLIT_GL_TEST_CONFIG_BEGIN and PIGLIT_GL_TEST_CONFIG_END, without
fear of tripping over framework-specific command line args like
"-auto" and "-fbo".