Platform: added WindowlessIosContext::glContext() for consistency.

All other classes have it, so why not here as well.

doc/changelog.dox

@@ -217,6 +217,8 @@ See also:
     @ref Platform::EmscriptenApplication and @ref Platform::Sdl2Application now
     notify about that in the verbose output (enabled with `?magnum-log=verbose`),
     previously only autodetected canvas size got printed
+-   Added @ref Platform::WindowlessIosContext::glContext() for consistency with
+    other context classes
 
 @subsubsection changelog-latest-changes-shaders Shaders library
 

src/Magnum/Platform/WindowlessIosApplication.h

@@ -119,6 +119,16 @@ class WindowlessIosContext {
          */
         bool makeCurrent();
 
+        /**
+         * @brief Underlying OpenGL context
+         * @m_since_latest
+         *
+         * Use in case you need to call EAGL functionality directly or in order
+         * to create a shared context. Returns @cpp nullptr @ce in case the
+         * context was not created yet.
+         */
+        EAGLContext* glContext() { return _context; }
+
     private:
         EAGLContext* _context{};
 };