Use `file --dereference' instead of `readlink -f' + `file'.

`readlink -f' is not standard and may not be present on all systems (such as
some BSDs).

Instead of the readlink+file combo, just ask file(1) to dereference the file
it is given.

R=mark@chromium.org

Review URL: https://codereview.chromium.org/19221002

git-svn-id: http://src.chromium.org/svn/trunk/src/build@211783 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

linux/python_arch.sh

@@ -10,12 +10,7 @@
 #  python_arch.sh /path/to/sysroot/usr/lib/libpython2.4.so.1.0
 #
 
-python=$(readlink -f "$1")
-if [ ! -r "$python" ]; then
-  echo unknown
-  exit 0
-fi
-file_out=$(file "$python")
+file_out=$(file --dereference "$1")
 if [ $? -ne 0 ]; then
   echo unknown
   exit 0