add Settings to debug.BuildInfo

Signed-off-by: Rajat Jindal <rajatjindal83@gmail.com>

src/runtime/debug/debug.go

@@ -36,6 +36,14 @@ type BuildInfo struct {
 	Path     string    // The main package path
 	Main     Module    // The module containing the main package
 	Deps     []*Module // Module dependencies
+	Settings []BuildSetting
+}
+
+type BuildSetting struct {
+	// Key and Value describe the build setting.
+	// Key must not contain an equals sign, space, tab, or newline.
+	// Value must not contain newlines ('\n').
+	Key, Value string
 }
 
 // Module represents a module.