GN: Use rsp file, not rsp file contents, in solink line

build/toolchain/gcc_toolchain.gni

 # 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.
 
 # This template defines a toolchain for something that works like gcc
 # (including clang).
 #
 # It requires the following variables specifying the executables to run:
 #  - cc
 #  - cxx
@@ skipping 88 matching lines @@
       rspfile = "\$out.rsp"
       rspfile_content = "\$in"
     }
     tool("solink") {
       rspfile = "\$out.rsp"
       rspfile_content = "-Wl,--whole-archive \$in \$solibs -Wl,--no-whole-archive $solink_libs_section_prefix \$libs $solink_libs_section_postfix"
 
       # TODO(cjhopman): There needs to be a way for gn to correctly figure out
       # the outputs of a solink command.
 
-      link_command = "$ld -shared \$ldflags -o \$lib -Wl,-soname=\$soname $rspfile_content"
+      link_command = "$ld -shared \$ldflags -o \$lib -Wl,-soname=\$soname @\$rspfile"
       toc_command = "{ readelf -d \${lib} | grep SONAME ; nm -gD -f p \${lib} | cut -f1-2 -d' '; } > \${lib}.tmp"
       replace_command = "if ! cmp -s \${lib}.tmp \${lib}.TOC; then mv \${lib}.tmp \${lib}.TOC; fi"
       command = "$link_command && $toc_command && $replace_command"
 
       if (defined(invoker.postsolink)) {
         command += " && " + invoker.postsolink
       }
 
       description = "SOLINK \$lib"
       #pool = "link_pool"
@@ skipping 23 matching lines @@
       if (defined(invoker.is_clang)) {
         is_clang = invoker.is_clang
       }
     }
 
     if (defined(invoker.deps)) {
       deps = invoker.deps
     }
   }
 }