doc: added GL_MAX_VERTEX_ATTRIB_STRIDE to mapping and support table.

Added in 4.4 but not backed by any extension.

doc/opengl-mapping.dox

@@ -442,6 +442,7 @@ OpenGL function                         | Matching API
 @def_gl{MAX_UNIFORM_BUFFER_BINDINGS}    | @ref Buffer::maxUniformBindings()
 @def_gl{MAX_UNIFORM_LOCATIONS}          | @ref AbstractShaderProgram::maxUniformLocations()
 @def_gl{MAX_VERTEX_ATTRIBS}             | @ref AbstractShaderProgram::maxVertexAttributes()
+@def_gl{MAX_VERTEX_ATTRIB_STRIDE}       | |
 @def_gl{MAX_VERTEX_ATTRIB_BINDINGS}     | |
 @def_gl{MAX_VERTEX_ATTRIB_RELATIVE_OFFSET} | |
 @def_gl{MAX_VIEWPORTS}                  | |

doc/opengl-support.dox

@@ -195,6 +195,7 @@ following:
 
 %Extension                                  | Status
 ------------------------------------------- | ------
+@def_gl{MAX_VERTEX_ATTRIB_STRIDE}           | |
 @extension{ARB,buffer_storage}              | |
 @extension{ARB,clear_texture}               | |
 @extension{ARB,enhanced_layouts}            | done (shading language only)