allow abi 0.1.0 (#107)

Signed-off-by: mathetake <[email protected]>

Author: mathetake

proxywasm/abi_version.go

@@ -12,6 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+// +build !abi_010
+
 package proxywasm
 
 //nolint

proxywasm/abi_version_010.go

@@ -0,0 +1,21 @@
+// Copyright 2020 Tetrate
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build abi_010
+
+package proxywasm
+
+//nolint
+//export proxy_abi_version_0_1_0
+func proxyABIVersion() {}