Now it starts requiring bash instead of POSIX-compatible shell, but this
is not a problem since other scripts in here do same.
Signed-off-by: Igor Gnatenko <ignatenkobrain@fedoraproject.org>
Introduces __brp_mangle_shebangs_exclude_from and __brp_mangle_shebangs_exclude
* the first allows to explude specific paths from the mangling
* the second allows to exlude specific shebangs
Both are used with `grep -E`. Similar escaping rules as in [1] apply.
[1] https://fedoraproject.org/wiki/Packaging:AutoProvidesAndRequiresFiltering
