Create snapshot/mac and move some files from snapshot and util to there

snapshot/mac/process_types/loader.proctype

 // Copyright 2014 The Crashpad Authors. 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.
 
 // This file corresponds to the system’s <mach-o/loader.h>.
 //
 // This file is intended to be included multiple times in the same translation
 // unit, so #include guards are intentionally absent.
 //
-// This file is included by util/mac/process_types.h and
-// util/mac/process_types.cc to produce process type struct definitions and
+// This file is included by snapshot/mac/process_types.h and
+// snapshot/mac/process_types.cc to produce process type struct definitions and
 // accessors.
 
 PROCESS_TYPE_STRUCT_BEGIN(mach_header)  // 64-bit: mach_header_64
   PROCESS_TYPE_STRUCT_MEMBER(uint32_t, magic)
 
   // cputype is really cpu_type_t, a typedef for integer_t, itself a typedef for
   // int. It is currently reasonable to assume that int is int32_t.
   PROCESS_TYPE_STRUCT_MEMBER(int32_t, cputype)
 
   // cpusubtype is really cpu_subtype_t, a typedef for integer_t, itself a
@@ skipping 99 matching lines @@
   PROCESS_TYPE_STRUCT_MEMBER(ULong, size)
   PROCESS_TYPE_STRUCT_MEMBER(uint32_t, offset)
   PROCESS_TYPE_STRUCT_MEMBER(uint32_t, align)
   PROCESS_TYPE_STRUCT_MEMBER(uint32_t, reloff)
   PROCESS_TYPE_STRUCT_MEMBER(uint32_t, nreloc)
   PROCESS_TYPE_STRUCT_MEMBER(uint32_t, flags)
   PROCESS_TYPE_STRUCT_MEMBER(uint32_t, reserved1)
   PROCESS_TYPE_STRUCT_MEMBER(uint32_t, reserved2)
   PROCESS_TYPE_STRUCT_MEMBER(Reserved64Only, reserved3)
 PROCESS_TYPE_STRUCT_END(section)