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_struct.go

@@ -0,0 +1,59 @@
+package reflect2
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+type UnsafeStructType struct {
+	unsafeType
+	likePtr bool
+}
+
+func newUnsafeStructType(cfg *frozenConfig, type1 reflect.Type) *UnsafeStructType {
+	return &UnsafeStructType{
+		unsafeType: *newUnsafeType(cfg, type1),
+		likePtr:    likePtrType(type1),
+	}
+}
+
+func (type2 *UnsafeStructType) LikePtr() bool {
+	return type2.likePtr
+}
+
+func (type2 *UnsafeStructType) Indirect(obj interface{}) interface{} {
+	objEFace := unpackEFace(obj)
+	assertType("Type.Indirect argument 1", type2.ptrRType, objEFace.rtype)
+	return type2.UnsafeIndirect(objEFace.data)
+}
+
+func (type2 *UnsafeStructType) UnsafeIndirect(ptr unsafe.Pointer) interface{} {
+	if type2.likePtr {
+		return packEFace(type2.rtype, *(*unsafe.Pointer)(ptr))
+	}
+	return packEFace(type2.rtype, ptr)
+}
+
+func (type2 *UnsafeStructType) FieldByName(name string) StructField {
+	structField, found := type2.Type.FieldByName(name)
+	if !found {
+		return nil
+	}
+	return newUnsafeStructField(type2, structField)
+}
+
+func (type2 *UnsafeStructType) Field(i int) StructField {
+	return newUnsafeStructField(type2, type2.Type.Field(i))
+}
+
+func (type2 *UnsafeStructType) FieldByIndex(index []int) StructField {
+	return newUnsafeStructField(type2, type2.Type.FieldByIndex(index))
+}
+
+func (type2 *UnsafeStructType) FieldByNameFunc(match func(string) bool) StructField {
+	structField, found := type2.Type.FieldByNameFunc(match)
+	if !found {
+		panic("field match condition not found in " + type2.Type.String())
+	}
+	return newUnsafeStructField(type2, structField)
+}