[fixed-to-float-patches] Fix use of glClearColor and glColor under GLES 2

[fixed-to-float-patches] Fix use of glClearColor and glColor under GLES 2

The wrapper for glClearColor was taking fixed arguments but was given
floating point values so it ended up always setting the clear color to
black. Now that GLES 1.1 is using the floating point version, there is
no need for the wrapper so both versions now just use glClearColor
directly.

A similar problem was happening for glColor but this does still need a
wrapper because it needs to set the vertex attribute.