Make each NaCl glibc test copy its shared libraries into a unique directory.

chrome/test/data/nacl/nacl_browser_test.gypi

 # Copyright (c) 2012 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.
 
 {
   'includes': [
     '../../../../native_client/build/untrusted.gypi',
   ],
   'target_defaults': {
     # We need to override the variables in untrusted.gypi outside of a
@@ skipping 104 matching lines @@
                 # NOTE: There is no explicit dependency for the lib32
                 # and lib64 directories created in the PRODUCT_DIR.
                 # They are created as a side-effect of NMF creation.
                 'outputs': ['>(nmf_glibc)'],
                 'action': [
                   'python',
                   '<(DEPTH)/native_client_sdk/src/tools/create_nmf.py',
                   '>@(_inputs)',
                   '--objdump=>(nacl_objdump)',
                   '--output=>(nmf_glibc)',
+                  '--path-prefix=>(nexe_target)_libs',
                   '--stage-dependencies=<(nacl_glibc_out_dir)',
                   '--toolchain=glibc',
                 ],
                 'target_conditions': [
                   ['enable_x86_64==1', {
                     'inputs': ['>(out_glibc64)'],
                     'action': ['--library-path=>(libdir_glibc64)'],
                   }],
                   ['enable_x86_32==1', {
                     'inputs': ['>(out_glibc32)'],
                     'action': ['--library-path=>(libdir_glibc32)'],
                   }],
                   # TODO(ncbray) handle arm case.  We don't have ARM glibc yet.
                 ],
               },
             ],
           }],
         ],
       }],
     ],
   },
 }