Force ELF.path to be of type string (Gallopsled#2174)

This commit forces the `path` class variable of the `ELF` class to be of
type string, even if a byte string argument is passed. This also makes
the implementation consistent with the documentation, which states that
`ELF.path` is of type `str`.

Fixes Gallopsled#2166

Cherry-picked from 60af3a2

Signed-off-by: James Raphael Tiovalen <[email protected]>

Author: jamestiotio

pwnlib/elf/elf.py

@@ -225,7 +225,7 @@ def __init__(self, path, checksec=True):
         super(ELF,self).__init__(self.mmap)
 
         #: :class:`str`: Path to the file
-        self.path = os.path.abspath(path)
+        self.path = packing._need_text(os.path.abspath(path))
 
         #: :class:`str`: Architecture of the file (e.g. ``'i386'``, ``'arm'``).
         #: