Special-case paths that appear in libs by not prefixing them with -l.

tools/gn/command_desc.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 <algorithm>
 #include <set>
 #include <sstream>
 
 #include "base/command_line.h"
 #include "tools/gn/commands.h"
@@ skipping 151 matching lines @@
     return;
 
   if (display_header)
     OutputString("\nlib_dirs\n");
 
   for (size_t i = 0; i < lib_dirs.size(); i++)
     OutputString("    " + FormatSourceDir(lib_dirs[i]) + "\n");
 }
 
 void PrintLibs(const Target* target, bool display_header) {
-  const OrderedSet<std::string>& libs = target->all_libs();
+  const OrderedSet<LibFile>& libs = target->all_libs();
   if (libs.empty())
     return;
 
   if (display_header)
     OutputString("\nlibs\n");
 
   for (size_t i = 0; i < libs.size(); i++)
-    OutputString("    " + libs[i] + "\n");
+    OutputString("    " + libs[i].value() + "\n");
 }
 
 void PrintPublic(const Target* target, bool display_header) {
   if (display_header)
     OutputString("\npublic:\n");
 
   if (target->all_headers_public()) {
     OutputString("  [All headers listed in the sources are public.]\n");
     return;
   }
@@ skipping 552 matching lines @@
   // so always display them, even for groups and such.
   PrintLibs(target, true);
   PrintLibDirs(target, true);
 
   PrintDeps(target, true);
 
   return 0;
 }
 
 }  // namespace commands