Update to last common bleve (#3986)

vendor/github.com/tinylib/msgp/msgp/purego.go

@@ -0,0 +1,15 @@
+// +build purego appengine
+
+package msgp
+
+// let's just assume appengine
+// uses 64-bit hardware...
+const smallint = false
+
+func UnsafeString(b []byte) string {
+	return string(b)
+}
+
+func UnsafeBytes(s string) []byte {
+	return []byte(s)
+}