core: Fix problem when path to erl_call contains a tilde (~)
core: Fix problem when path to erl_call contains a tilde (~)

This should fix running Zotonic on cygwin.

erlanger-ru/erlanger-ru.meta,erlanger-ru/erlanger-ru.meta,erlanger-ru/erlanger-ru.meta,erlanger-ru/erlanger-ru.meta,erlanger-ru/erlanger-ru.meta