Go vendor update

vendor/google.golang.org/protobuf/internal/impl/pointer_unsafe.go

@@ -138,6 +138,46 @@ func (p pointer) SetPointer(v pointer) {
 	*(*unsafe.Pointer)(p.p) = (unsafe.Pointer)(v.p)
 }
 
+func (p pointer) growBoolSlice(addCap int) {
+	sp := p.BoolSlice()
+	s := make([]bool, 0, addCap+len(*sp))
+	s = s[:len(*sp)]
+	copy(s, *sp)
+	*sp = s
+}
+
+func (p pointer) growInt32Slice(addCap int) {
+	sp := p.Int32Slice()
+	s := make([]int32, 0, addCap+len(*sp))
+	s = s[:len(*sp)]
+	copy(s, *sp)
+	*sp = s
+}
+
+func (p pointer) growUint32Slice(addCap int) {
+	p.growInt32Slice(addCap)
+}
+
+func (p pointer) growFloat32Slice(addCap int) {
+	p.growInt32Slice(addCap)
+}
+
+func (p pointer) growInt64Slice(addCap int) {
+	sp := p.Int64Slice()
+	s := make([]int64, 0, addCap+len(*sp))
+	s = s[:len(*sp)]
+	copy(s, *sp)
+	*sp = s
+}
+
+func (p pointer) growUint64Slice(addCap int) {
+	p.growInt64Slice(addCap)
+}
+
+func (p pointer) growFloat64Slice(addCap int) {
+	p.growInt64Slice(addCap)
+}
+
 // Static check that MessageState does not exceed the size of a pointer.
 const _ = uint(unsafe.Sizeof(unsafe.Pointer(nil)) - unsafe.Sizeof(MessageState{}))