internal/reflect: expose stubs funcs for reflect2

Yikes. For etcd.

internal/reflect/no.go

@@ -0,0 +1,58 @@
+package reflect
+
+import "unsafe"
+
+// link names used by the reflect2 package, used indirectly by etcd. expose them
+// to let the package compile. make all of them panic to prevent usage.
+
+func unsafe_New(rtype unsafe.Pointer) unsafe.Pointer {
+	panic("no")
+}
+
+func typedmemmove(rtype unsafe.Pointer, dst, src unsafe.Pointer) {
+	panic("no")
+}
+
+func unsafe_NewArray(rtype unsafe.Pointer, length int) unsafe.Pointer {
+	panic("no")
+}
+
+type noSliceHeader struct {
+	Data unsafe.Pointer
+	Len  int
+	Cap  int
+}
+
+func typedslicecopy(elemType unsafe.Pointer, dst, src noSliceHeader) int {
+	panic("no")
+}
+
+func mapassign(rtype unsafe.Pointer, m unsafe.Pointer, key, val unsafe.Pointer) {
+	panic("no")
+}
+
+func mapaccess(rtype unsafe.Pointer, m unsafe.Pointer, key unsafe.Pointer) (val unsafe.Pointer) {
+	panic("no")
+}
+
+type noHiter struct {
+	key   unsafe.Pointer // Must be in first position.  Write nil to indicate iteration end (see cmd/internal/gc/range.go).
+	value unsafe.Pointer // Must be in second position (see cmd/internal/gc/range.go).
+	// rest fields are ignored
+}
+
+func mapiterinit(rtype unsafe.Pointer, m unsafe.Pointer) *noHiter {
+	panic("no")
+}
+
+func mapiternext(it *noHiter) {
+	panic("no")
+}
+
+func ifaceE2I(rtype unsafe.Pointer, src interface{}, dst unsafe.Pointer) {
+	panic("no")
+}
+
+func makemap(rtype unsafe.Pointer, cap int) (m unsafe.Pointer) {
+	panic("no")
+}