Fix the documented default value for --enable-cogl-path
Fix the documented default value for --enable-cogl-path

As far as I can tell --enable-cogl-path is enabled by default but the
help string for it was suggesting otherwise.

Reviewed-by: Robert Bragg <12e9293ec6b30c7fa8a0926af42807e929c1684f@linux.intel.com>

djdeath/cogl,djdeath/cogl,djdeath/cogl