Plugins: Run autoreconf twice if necessary

Symtom was (on macOS):
> [..]
> aclocal: error: too many loops
> aclocal: Please contact <bug-automake@gnu.org>.
>  at /usr/local/Cellar/automake/1.16.5/share/automake-1.16/Automake/Channels.pm line 655.
>       Automake::Channels::msg("automake", "", "too many loops") called at /usr/local/Cellar/automake/1.16.5/share/automake-1.16/Automake/ChannelDefs.pm line 226
>       Automake::ChannelDefs::prog_error("too many loops") called at /usr/local/bin/aclocal line 1187
> autoreconf: error: aclocal failed with exit status: 255

Author: hartwork

libvisual/autogen.sh

@@ -4,6 +4,7 @@
 
 set -e -u
 
+autoreconf --install --verbose --force || \
 autoreconf --install --verbose --force
 
 if [[ -z "${NOCONFIGURE:-}" ]]; then