Use EGL_KHR_create_context with GLES as well.

src/x11_egl_opengl.c

@@ -252,17 +252,13 @@ static int createContext(_GLFWwindow* window,
         return GL_FALSE;
     }
 
-    index = 0;
-
     if (wndconfig->clientAPI == GLFW_OPENGL_ES_API)
-    {
         eglBindAPI(EGL_OPENGL_ES_API);
-        setEGLattrib(attribs, index, EGL_CONTEXT_CLIENT_VERSION, wndconfig->glMajor);
-    }
     else
-    {
         eglBindAPI(EGL_OPENGL_API);
 
+    index = 0;
+
     if (_glfwLibrary.EGL.KHR_create_context)
     {
         setEGLattrib(attribs, index, EGL_CONTEXT_MAJOR_VERSION_KHR, wndconfig->glMajor);
@@ -308,6 +304,10 @@ static int createContext(_GLFWwindow* window,
             setEGLattrib(attribs, index, EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_KHR, strategy);
         }
     }
+    else
+    {
+        if (wndconfig->clientAPI == GLFW_OPENGL_ES_API)
+            setEGLattrib(attribs, index, EGL_CONTEXT_CLIENT_VERSION, wndconfig->glMajor);
     }
 
     setEGLattrib(attribs, index, EGL_NONE, EGL_NONE);