fix: improve gdb checker

[ffontaine]

Improve gdb pattern to handle openwrt gdb binaries

[terriko]

Error on windows does look related:

 =========================== short test summary info ===========================
FAILED test/test_scanner.py::TestScanner::test_version_in_package[http://rpmfind.net/linux/opensuse/ports/aarch64/tumbleweed/repo/oss/aarch64/-perl-5.36.0-3.5.aarch64.rpm-perl-5.36.0-other_products773] - AssertionError: gdb found in perl-5.36.0-3.5.aarch64.rpm. If that's expected, make sure to add gdb to the expected list of other_products.
assert 'gdb' not in {'gdb', 'perl'}

I'm not sure what weird strings there are in perl and why it's only triggering on the windows scans. Did the defaults for how windows checks out files change or something that might be causing aberrant results? We saw some odd behaviour on windows in some of the hacktoberfest checkers too.

[ffontaine]

I fixed the pattern, issue was also raised on Linux.

[terriko]

Looks like this is behaving now. thank you!