Use the installed/downloaded objdump instead of work-dir one.

pydir/build-runtime.py

 #!/usr/bin/env python2
 
 import argparse
 import os
 import shutil
 import tempfile
 from utils import shellcmd
 from utils import FindBaseNaCl
 
 def Translate(ll_files, extra_args, obj, verbose):
@@ skipping 19 matching lines @@
 
 def main():
     """Build the Subzero runtime support library for all architectures.
     """
     argparser = argparse.ArgumentParser(
         description='    ' + main.__doc__,
         formatter_class=argparse.RawTextHelpFormatter)
     argparser.add_argument('--verbose', '-v', dest='verbose',
                            action='store_true',
                            help='Display some extra debugging output')
+    argparser.add_argument('--pnacl-root', dest='pnacl_root',
+                           help='Path to PNaCl toolchain binaries.')
     args = argparser.parse_args()
     nacl_root = FindBaseNaCl()
-    os.environ['PATH'] = (
-        '{root}/toolchain/linux_x86/pnacl_newlib/bin{sep}' +
-        '{path}'
-        ).format(root=nacl_root, sep=os.pathsep, path=os.environ['PATH'])
+    os.environ['PATH'] = ('{root}/bin{sep}{path}'
+        ).format(root=args.pnacl_root, sep=os.pathsep, path=os.environ['PATH'])
     srcdir = (
         '{root}/toolchain_build/src/subzero/runtime'
         ).format(root=nacl_root)
     rtdir = (
         '{root}/toolchain_build/src/subzero/build/runtime'
         ).format(root=nacl_root)
     try:
         tempdir = tempfile.mkdtemp()
         if os.path.exists(rtdir) and not os.path.isdir(rtdir):
             os.remove(rtdir)
@@ skipping 28 matching lines @@
                   args.verbose)
     finally:
         try:
             shutil.rmtree(tempdir)
         except OSError as exc:
             if exc.errno != errno.ENOENT: # ENOENT - no such file or directory
                 raise # re-raise exception
 
 if __name__ == '__main__':
     main()