Check in the vendor directory

Travis seems to be having issues pulling deps, so we'll have to check in
the vendor directory and prevent the makefile from trying to regenerate
it normally.

vendor/github.com/modern-go/reflect2/unsafe_field.go

@@ -0,0 +1,74 @@
+package reflect2
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+type UnsafeStructField struct {
+	reflect.StructField
+	structType *UnsafeStructType
+	rtype      unsafe.Pointer
+	ptrRType   unsafe.Pointer
+}
+
+func newUnsafeStructField(structType *UnsafeStructType, structField reflect.StructField) *UnsafeStructField {
+	return &UnsafeStructField{
+		StructField: structField,
+		rtype:       unpackEFace(structField.Type).data,
+		ptrRType:    unpackEFace(reflect.PtrTo(structField.Type)).data,
+		structType:  structType,
+	}
+}
+
+func (field *UnsafeStructField) Offset() uintptr {
+	return field.StructField.Offset
+}
+
+func (field *UnsafeStructField) Name() string {
+	return field.StructField.Name
+}
+
+func (field *UnsafeStructField) PkgPath() string {
+	return field.StructField.PkgPath
+}
+
+func (field *UnsafeStructField) Type() Type {
+	return field.structType.cfg.Type2(field.StructField.Type)
+}
+
+func (field *UnsafeStructField) Tag() reflect.StructTag {
+	return field.StructField.Tag
+}
+
+func (field *UnsafeStructField) Index() []int {
+	return field.StructField.Index
+}
+
+func (field *UnsafeStructField) Anonymous() bool {
+	return field.StructField.Anonymous
+}
+
+func (field *UnsafeStructField) Set(obj interface{}, value interface{}) {
+	objEFace := unpackEFace(obj)
+	assertType("StructField.SetIndex argument 1", field.structType.ptrRType, objEFace.rtype)
+	valueEFace := unpackEFace(value)
+	assertType("StructField.SetIndex argument 2", field.ptrRType, valueEFace.rtype)
+	field.UnsafeSet(objEFace.data, valueEFace.data)
+}
+
+func (field *UnsafeStructField) UnsafeSet(obj unsafe.Pointer, value unsafe.Pointer) {
+	fieldPtr := add(obj, field.StructField.Offset, "same as non-reflect &v.field")
+	typedmemmove(field.rtype, fieldPtr, value)
+}
+
+func (field *UnsafeStructField) Get(obj interface{}) interface{} {
+	objEFace := unpackEFace(obj)
+	assertType("StructField.GetIndex argument 1", field.structType.ptrRType, objEFace.rtype)
+	value := field.UnsafeGet(objEFace.data)
+	return packEFace(field.ptrRType, value)
+}
+
+func (field *UnsafeStructField) UnsafeGet(obj unsafe.Pointer) unsafe.Pointer {
+	return add(obj, field.StructField.Offset, "same as non-reflect &v.field")
+}