[chore] add back exif-terminator and use only for jpeg,png,webp (#3161)

* add back exif-terminator and use only for jpeg,png,webp

* fix arguments passed to terminateExif()

* pull in latest exif-terminator

* fix test

* update processed img

---------

Co-authored-by: tobi <tobi.smethurst@protonmail.com>

vendor/github.com/golang/geo/s2/bits_go18.go

@@ -0,0 +1,53 @@
+// Copyright 2018 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build !go1.9
+
+package s2
+
+// This file is for the bit manipulation code pre-Go 1.9.
+
+// findMSBSetNonZero64 returns the index (between 0 and 63) of the most
+// significant set bit. Passing zero to this function returns zero.
+func findMSBSetNonZero64(x uint64) int {
+	val := []uint64{0x2, 0xC, 0xF0, 0xFF00, 0xFFFF0000, 0xFFFFFFFF00000000}
+	shift := []uint64{1, 2, 4, 8, 16, 32}
+	var msbPos uint64
+	for i := 5; i >= 0; i-- {
+		if x&val[i] != 0 {
+			x >>= shift[i]
+			msbPos |= shift[i]
+		}
+	}
+	return int(msbPos)
+}
+
+const deBruijn64 = 0x03f79d71b4ca8b09
+const digitMask = uint64(1<<64 - 1)
+
+var deBruijn64Lookup = []byte{
+	0, 1, 56, 2, 57, 49, 28, 3, 61, 58, 42, 50, 38, 29, 17, 4,
+	62, 47, 59, 36, 45, 43, 51, 22, 53, 39, 33, 30, 24, 18, 12, 5,
+	63, 55, 48, 27, 60, 41, 37, 16, 46, 35, 44, 21, 52, 32, 23, 11,
+	54, 26, 40, 15, 34, 20, 31, 10, 25, 14, 19, 9, 13, 8, 7, 6,
+}
+
+// findLSBSetNonZero64 returns the index (between 0 and 63) of the least
+// significant set bit. Passing zero to this function returns zero.
+//
+// This code comes from trailingZeroBits in https://golang.org/src/math/big/nat.go
+// which references (Knuth, volume 4, section 7.3.1).
+func findLSBSetNonZero64(x uint64) int {
+	return int(deBruijn64Lookup[((x&-x)*(deBruijn64&digitMask))>>58])
+}