MIPS trusted toolchain: Don't skip QEMU patch if the file is missing

tools/trusted_cross_toolchains/trusted-toolchain-creator.mipsel.squeeze.sh

 #!/bin/bash
 # Copyright 2012 The Native Client 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 script creates the mips trusted SDK.
 #@ It must be run from the native_client directory.
 
 # This script is intended to build a mipsel-linux-gnu cross compilation
 # toolchain that runs on x86 linux and generates code for a little-endian,
@@ skipping 549 matching lines @@
 
   Banner "Building qemu in ${tmpdir}"
 
   rm -rf ${tmpdir}
   mkdir ${tmpdir}
   cd ${tmpdir}
 
   SubBanner "Downloading"
   wget -c ${DOWNLOAD_QEMU_URL}
 
-  SubBanner "Untaring"
+  SubBanner "Untarring"
   tar zxf  ${tarball}
   cd qemu-0.12.5
-
-  if [ -f "${PATCH_MIPS32}" ]; then
-    SubBanner "Patching"
-    patch -p1 < ${PATCH_MIPS32}
-  fi
+  SubBanner "Patching"
+  patch -p1 < ${PATCH_MIPS32}
 
   echo
   echo "NOTE: on 64 bit systems you will need to the following 32bit libs:"
   echo "lib32z1-dev"
   echo
 
   SubBanner "Configuring"
   env -i PATH=/usr/bin/:/bin \
     ./configure \
     --cc=${CC32} \
@@ skipping 38 matching lines @@
   InstallTrustedLinkerScript
   BuildAndInstallQemu
   CreateTarBall $1
 
 else
   Usage
   exit -1
 
 fi