0) Context
DEB packages of mediawiki and many of its extensions, are prepared as part of the WP-MIRROR project.
See <https://www.mediawiki.org/wiki/Wp-mirror>.
1) Lintian
During the build process, lintian performs a great number of sanity checks, including seeing if each executable file has a shebang line (a line beginning with #! that serves as an interpreter directive).
See <https://en.wikipedia.org/wiki/Shebang_(Unix)>.
When lintian sees a file with 755 permissions without a shebang line, lintian will throw a warning like:
W: wp-mirror-mediawiki: executable-not-elf-or-script usr/share/wp-mirror-mediawiki/maintenance/dev/includes/require-php.sh
2) Files which need a shebang line:
maintenance/dev/includes/require-php.sh
maintenance/dev/includes/php.sh
3) Technical details
DEB standards version: 3.9.6
GIT branch: master