Add curly brackets to list of characters that gn needs to escape

tools/gn/escape.cc

 // Copyright (c) 2013 The Chromium 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 "tools/gn/escape.h"
 
 #include <stddef.h>
 
 #include "base/containers/stack_container.h"
 #include "base/logging.h"
@@ skipping 10 matching lines @@
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1,
 //  0  1  2  3  4  5  6  7  8  9  :  ;  <  =  >  ?
     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 0, 0,
 //  @  A  B  C  D  E  F  G  H  I  J  K  L  M  N  O
     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
 //  P  Q  R  S  T  U  V  W  X  Y  Z  [  \  ]  ^  _
     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1,
 //  `  a  b  c  d  e  f  g  h  i  j  k  l  m  n  o
     0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
 //  p  q  r  s  t  u  v  w  x  y  z  {  |  }  ~
-    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 0 };
+    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 };
 
 // Append one character to the given string, escaping it for Ninja.
 //
 // Ninja's escaping rules are very simple. We always escape colons even
 // though they're OK in many places, in case the resulting string is used on
 // the left-hand-side of a rule.
 template<typename DestString>
 inline void NinjaEscapeChar(char ch, DestString* dest) {
   if (ch == '$' || ch == ' ' || ch == ':')
     dest->push_back('$');
@@ skipping 158 matching lines @@
 }
 
 void EscapeStringToStream(std::ostream& out,
                           const base::StringPiece& str,
                           const EscapeOptions& options) {
   base::StackString<256> escaped;
   EscapeStringToString(str, options, &escaped.container(), nullptr);
   if (!escaped->empty())
     out.write(escaped->data(), escaped->size());
 }