audit: don't split shell commands when using a glob pattern
audit: don't split shell commands when using a glob pattern

Without this, `brew audit <some formula>` may ask people to change:

    system "./script.sh foo-*"

into:

    system "./script.sh", "foo-*"

These are not the same. In the first example the shell expansion occurs
while it doesn’t in the second one, breaking the build.

Closes Homebrew/homebrew#38540.

Signed-off-by: Mike McQuaid <a17fed27eaa842282862ff7c1b9c8395a26ac320@mikemcquaid.com>

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