vendor: Update everything

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/4620

vendor/github.com/kardianos/osext/osext_procfs.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !go1.8,linux !go1.8,netbsd !go1.8,solaris !go1.8,dragonfly
+// +build !go1.8,android !go1.8,linux !go1.8,netbsd !go1.8,solaris !go1.8,dragonfly
 
 package osext
 
@@ -16,7 +16,7 @@ import (
 
 func executable() (string, error) {
 	switch runtime.GOOS {
-	case "linux":
+	case "linux", "android":
 		const deletedTag = " (deleted)"
 		execpath, err := os.Readlink("/proc/self/exe")
 		if err != nil {