add SVM metadata to support graal (#25)

Author: Mkabaka

httpserver/src/main/resources/META-INF/native-image/io.esastack/httpserver/native-image.properties

@@ -0,0 +1,4 @@
+Args = -H:ReflectionConfigurationResources=${.}/reflection-config.json\
+  \ --initialize-at-build-time=io.esastack.httpserver\
+  \ --initialize-at-run-time=io.esastack.httpserver.impl.H2cDetector,\
+  io.esastack.httpserver.transport.NioTransport

httpserver/src/main/resources/META-INF/native-image/io.esastack/httpserver/reflection-config.json

@@ -0,0 +1,21 @@
+[
+  {
+    "name":"io.esastack.httpserver.impl.Http1Handler",
+    "methods":[
+      {"name":"channelInactive","parameterTypes":["io.netty.channel.ChannelHandlerContext"] },
+      {"name":"channelReadComplete","parameterTypes":["io.netty.channel.ChannelHandlerContext"] },
+      {"name":"exceptionCaught","parameterTypes":["io.netty.channel.ChannelHandlerContext","java.lang.Throwable"] },
+      {"name":"userEventTriggered","parameterTypes":["io.netty.channel.ChannelHandlerContext","java.lang.Object"] }
+    ]
+  },
+  {
+    "name":"io.esastack.httpserver.impl.HttpServerChannelInitializr"
+  },
+  {
+    "name":"io.esastack.httpserver.impl.OnChannelActiveHandler",
+    "methods":[{"name":"channelActive","parameterTypes":["io.netty.channel.ChannelHandlerContext"] }]
+  },
+  {
+    "name":"io.esastack.httpserver.impl.RequestDecoder"
+  }
+]