relocatable.bbclass: Normalise the generated path

The generated path we create for the binaries RPATH can have a lot of directory
separators in. Use os.path.normpath() to tidy it up and only include the
required directory separators.

This patch is purely to appease my personal sense of niceness...

Signed-off-by: Joshua Lock <josh@linux.intel.com>

meta/classes/relocatable.bbclass

@@ -18,6 +18,7 @@ def process_dir (directory, d):
     dirs = os.listdir(directory)
     for file in dirs:
         fpath = directory + "/" + file
+        fpath = os.path.normpath(fpath)
         if os.path.islink(fpath):
             # Skip symlinks
             continue