[dev.cc] runtime: migrate Android/ARM port to Go.
I tested building Go itself, but not any of go.mobile tests.
LGTM=crawshaw
R=crawshaw, rsc
CC=golang-codereviews
https://golang.org/cl/179110043
diff --git a/src/runtime/os_android_arm.go b/src/runtime/os_android_arm.go
new file mode 100644
index 0000000..1328322
--- /dev/null
+++ b/src/runtime/os_android_arm.go
@@ -0,0 +1,15 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package runtime
+
+import _ "unsafe"
+
+// Export the runtime entry point symbol.
+//
+// Used by the app package to start the Go runtime after loading
+// a shared library via JNI. See golang.org/x/mobile/app.
+
+//go:cgo_export_static _rt0_arm_linux1
+//go:cgo_export_dynamic _rt0_arm_linux1
