LibGL+LibGPU+LibSoftGPU: Report texture clamp to edge support

Author: https://github.com/gmta
Commit: 1aa1c89afa
Pull-request: https://github.com/SerenityOS/serenity/pull/15150
Reviewed-by: https://github.com/linusg ✅
Reviewed-by: https://github.com/sunverwerth ✅

Userland/Libraries/LibGL/GLContext.cpp

@@ -926,6 +926,9 @@ void GLContext::build_extension_string()
     if (m_device_info.num_texture_units > 1)
         extensions.append("GL_ARB_multitexture"sv);
 
+    if (m_device_info.supports_texture_clamp_to_edge)
+        extensions.append("GL_EXT_texture_edge_clamp"sv);
+
     if (m_device_info.supports_texture_env_add) {
         extensions.append("GL_ARB_texture_env_add"sv);
         extensions.append("GL_EXT_texture_env_add"sv);