Add mapping for std::chrono

src/main/java/org/bytedeco/javacpp/chrono/Chrono.java

@@ -0,0 +1,4 @@
+package org.bytedeco.javacpp.chrono;
+
+public class Chrono {
+}

src/main/java/org/bytedeco/javacpp/presets/chrono.java

@@ -0,0 +1,10 @@
+package org.bytedeco.javacpp.presets;
+
+import org.bytedeco.javacpp.annotation.Properties;
+
+@Properties(
+    target = "org.bytedeco.javacpp.chrono",
+    global = "org.bytedeco.javacpp.chrono.Chrono"
+)
+public class chrono {
+}

src/main/java/org/bytedeco/javacpp/tools/Parser.java

@@ -3539,13 +3539,13 @@ boolean group(Context context, DeclarationList declList) throws ParserException
         Context ctx = new Context(context);
         Token[] prefixes = {Token.CLASS, Token.INTERFACE, Token.__INTERFACE, Token.STRUCT, Token.UNION};
         for (Token token = tokens.get(); !token.match(Token.EOF); token = tokens.next()) {
-            if (token.match(prefixes)) {
+            if (token.match((Object[]) prefixes)) {
                 foundGroup = true;
                 ctx.inaccessible = token.match(Token.CLASS);
                 break;
             } else if (token.match(Token.FRIEND)) {
                 friend = true;
-                if (!tokens.get(1).match(prefixes)) {
+                if (!tokens.get(1).match((Object[]) prefixes)) {
                     // assume group name follows
                     foundGroup = true;
                     break;