wgl: Fix requirements for creation of ES2 context
wgl: Fix requirements for creation of ES2 context

To create an ES2 context, Waffle required
WGL_EXT_create_context_es2_profile. Fix Waffle to require either
WGL_EXT_create_context_es_profile *or*
WGL_EXT_create_context_es2_profile, because
WGL_EXT_create_context_es_profile is an updated variant of
WGL_EXT_create_context_es2_profile that supercedes it.

Fixes #23: https://github.com/waffle-gl/waffle/issues/23
Reviewed-by: José Fonseca <61b5a29db2c0650f7c8510f93eece059c1b09320@vmware.com>
Signed-off-by: Chad Versace <a557f7f75bf28dc19ac99107f5cc7cd6b3fbdb1a@linux.intel.com>

maurossi/waffle,evelikov/waffle,fjhenigman/waffle,dcbaker/waffle,dcbaker/waffle,dcbaker/waffle,maurossi/waffle,waffle-gl/waffle,fjhenigman/waffle,waffle-gl/waffle,waffle-gl/waffle,chadversary/waffle,chadversary/waffle,fjhenigman/waffle,evelikov/waffle,maurossi/waffle,chadversary/waffle,waffle-gl/waffle,evelikov/waffle