add a new ELF program header:PT_GNU_PROPERTY

[EarthCompass]

ELFs containing this program header will cause patchkit to crash.

Traceback (most recent call last):
  File "./patch", line 34, in <module>
    patch = Patcher(binary, verbose=options.verbose, cflags=options.cflags)
  File "/****/patchkit/core/patcher.py", line 11, in __init__
    self.bin = Binary(binary)
  File "/****/patchkit/core/binary.py", line 29, in __init__
    if ph.isload:
  File "/****/patchkit/util/elffile.py", line 1435, in isload
    return PT[self.type].name == 'PT_LOAD'
  File "/****/patchkit/util/elffile.py", line 66, in __getitem__
    return self.bycode[key]
KeyError: 1685382483

So I did a simple fix. ; )

[hacrot3000]

Thanks @EarthCompass, it works well.