Fix missing label, update payload sizes

lib/msf/core/payload/windows/x64/reverse_winhttp.rb

@@ -327,6 +327,7 @@ module Payload::Windows::ReverseWinHttp_x64
       ^
     else
       asm << %Q^
+      failure:
         ; hard-coded to ExitProcess(whatever) for size
         mov r10, #{Rex::Text.block_api_hash('kernel32.dll', 'ExitProcess')}
         call rbp                      ; ExitProcess(whatever)

modules/payloads/stagers/windows/x64/reverse_http.rb

@@ -9,7 +9,7 @@ require 'msf/core/payload/windows/x64/reverse_http'
 
 module Metasploit4
 
-  CachedSize = 487
+  CachedSize = 486
 
   include Msf::Payload::Stager
   include Msf::Payload::Windows

modules/payloads/stagers/windows/x64/reverse_https.rb

@@ -9,7 +9,7 @@ require 'msf/core/payload/windows/x64/reverse_https'
 
 module Metasploit4
 
-  CachedSize = 521
+  CachedSize = 517
 
   include Msf::Payload::Stager
   include Msf::Payload::Windows

modules/payloads/stagers/windows/x64/reverse_winhttp.rb

@@ -9,7 +9,7 @@ require 'msf/core/payload/windows/x64/reverse_winhttp'
 
 module Metasploit4
 
-  CachedSize = 503
+  CachedSize = 510
 
   include Msf::Payload::Stager
   include Msf::Payload::Windows

modules/payloads/stagers/windows/x64/reverse_winhttps.rb

@@ -9,7 +9,7 @@ require 'msf/core/payload/windows/x64/reverse_winhttps'
 
 module Metasploit4
 
-  CachedSize = 540
+  CachedSize = 541
 
   include Msf::Payload::Stager
   include Msf::Payload::Windows