Make sure to pass PATH down to the shell executing libmagic.sh.
Make sure to pass PATH down to the shell executing libmagic.sh.

This is to include some custom locations present on Travis CI
virtual machines.

Signed-off-by: Krzysztof Wilczynski <9bf091559fc98493329f7d619638c79e91ccf029@linux.com>

kwilczynski/ruby-magic,kwilczynski/ruby-magic