Fix performance regression in compiler

When the commit at
https://github.com/erlang/rebar3/commit/8c4a74a3ed9ddd9841e6596ca86b81f3d43906c0
introduced a recursive search for build elements, it accidentally did so
using a function that accepts a regex for its match.

In doing so, if a behaviour or include had a name such as
`common_prefix` and that multiple other modules used the name
`common_prefix_<rest_of_name>`, all the other files would be seen as
dependencies to be checked in a directed graph.

This resulted in continuous re-checking of files that kept depending on
each others and blew the compile time up exponentially.

By using a delimitation on the regex (^<modulename>$), the build comes
back down to finding only the right files and becomes fast again.

0 files changed, 0 insertions, 0 deletions