deps: patch V8 to 6.4.388.45

Refs: https://github.com/v8/v8/compare/6.4.388.44...6.4.388.45

PR-URL: https://github.com/nodejs/node/pull/18751
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

deps/v8/gypfiles/gyp_v8

@@ -108,19 +108,14 @@ def run_gyp(args):
 if __name__ == '__main__':
   args = sys.argv[1:]
 
-  gyp_chromium_no_action = os.environ.get('GYP_CHROMIUM_NO_ACTION')
-  if gyp_chromium_no_action == '1':
-    print 'Skipping gyp_v8 due to GYP_CHROMIUM_NO_ACTION env var.'
+  gyp_chromium_no_action = os.environ.get('GYP_CHROMIUM_NO_ACTION', '1')
+  if gyp_chromium_no_action != '0':
+    print 'GYP is now disabled by default.\n'
+    print 'If you really want to run this, set the environment variable '
+    print 'GYP_CHROMIUM_NO_ACTION=0.'
     sys.exit(0)
 
   running_as_hook = '--running-as-hook'
-  if running_as_hook in args and gyp_chromium_no_action != '0':
-    print 'GYP is now disabled by default in runhooks.\n'
-    print 'If you really want to run this, either run '
-    print '`python gypfiles/gyp_v8` explicitly by hand '
-    print 'or set the environment variable GYP_CHROMIUM_NO_ACTION=0.'
-    sys.exit(0)
-
   if running_as_hook in args:
     args.remove(running_as_hook)
 

deps/v8/include/v8-version.h

@@ -11,7 +11,7 @@
 #define V8_MAJOR_VERSION 6
 #define V8_MINOR_VERSION 4
 #define V8_BUILD_NUMBER 388
-#define V8_PATCH_LEVEL 44
+#define V8_PATCH_LEVEL 45
 
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)