windows: move memory protection constants so that they are all together

Change-Id: I0dee287567bdbf882e804bcd5ed7dcd6f748b30c
Reviewed-on: https://go-review.googlesource.com/47340
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>

windows/memory_windows.go

@@ -16,7 +16,11 @@ const (
 	MEM_RESET_UNDO  = 0x01000000
 	MEM_LARGE_PAGES = 0x20000000
 
-	PAGE_NOACCESS  = 0x01
-	PAGE_READONLY  = 0x02
-	PAGE_READWRITE = 0x04
+	PAGE_NOACCESS          = 0x01
+	PAGE_READONLY          = 0x02
+	PAGE_READWRITE         = 0x04
+	PAGE_WRITECOPY         = 0x08
+	PAGE_EXECUTE_READ      = 0x20
+	PAGE_EXECUTE_READWRITE = 0x40
+	PAGE_EXECUTE_WRITECOPY = 0x80
 )

windows/ztypes_windows.go

@@ -165,11 +165,6 @@ const (
 	PROCESS_QUERY_INFORMATION = 0x00000400
 	SYNCHRONIZE               = 0x00100000
 
-	PAGE_WRITECOPY         = 0x08
-	PAGE_EXECUTE_READ      = 0x20
-	PAGE_EXECUTE_READWRITE = 0x40
-	PAGE_EXECUTE_WRITECOPY = 0x80
-
 	FILE_MAP_COPY    = 0x01
 	FILE_MAP_WRITE   = 0x02
 	FILE_MAP_READ    = 0x04