add a shim for the gef-file parser

[ritchie46]

No description provided.

[coveralls]

Pull Request Test Coverage Report for Build 3174538130

• 118 of 209 (56.46%) changed or added relevant lines in 12 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-3.8%) to 77.454%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pygef/tests/test_shim.py	2	4	50.0%
pygef/tests/xml/test_cpt.py	1	4	25.0%
pygef/gef/cpt.py	23	28	82.14%
pygef/cpt.py	56	62	90.32%
pygef/broxml/parse_cpt.py	3	11	27.27%
pygef/tests/conftest.py	0	12	0.0%
pygef/shim.py	11	66	16.67%

Totals
Change from base Build 3088986789:	-3.8%
Covered Lines:	1223
Relevant Lines:	1579

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💛 - Coveralls