Fix -Wshorten-64-to-32 errors on clang ARM64

src/base/cpu.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/base/cpu.h"
 
 #if V8_LIBC_MSVCRT
 #include <intrin.h>  // __cpuid()
 #endif
 #if V8_OS_LINUX
@@ skipping 589 matching lines @@
 #endif
 
 #elif V8_HOST_ARCH_ARM64
 
   CPUInfo cpu_info;
 
   // Extract implementor from the "CPU implementer" field.
   char* implementer = cpu_info.ExtractField("CPU implementer");
   if (implementer != NULL) {
     char* end;
-    implementer_ = strtol(implementer, &end, 0);
+    implementer_ = static_cast<int>(strtol(implementer, &end, 0));
     if (end == implementer) {
       implementer_ = 0;
     }
     delete[] implementer;
   }
 
   char* variant = cpu_info.ExtractField("CPU variant");
   if (variant != NULL) {
     char* end;
-    variant_ = strtol(variant, &end, 0);
+    variant_ = static_cast<int>(strtol(variant, &end, 0));
     if (end == variant) {
       variant_ = -1;
     }
     delete[] variant;
   }
 
   // Extract part number from the "CPU part" field.
   char* part = cpu_info.ExtractField("CPU part");
   if (part != NULL) {
     char* end;
-    part_ = strtol(part, &end, 0);
+    part_ = static_cast<int>(strtol(part, &end, 0));
     if (end == part) {
       part_ = 0;
     }
     delete[] part;
   }
 
 #elif V8_HOST_ARCH_PPC
 
 #ifndef USE_SIMULATOR
 #if V8_OS_LINUX
@@ skipping 60 matching lines @@
       part_ = PPC_POWER5;
       break;
   }
 #endif  // V8_OS_AIX
 #endif  // !USE_SIMULATOR
 #endif  // V8_HOST_ARCH_PPC
 }
 
 }  // namespace base
 }  // namespace v8