Summary: Export PERL5LIB for Alexine

Try again, now using the current directory in the test target of the
Makefile instead of changing run-tests.

scripts/alexine/run-tests

@@ -30,10 +30,6 @@ OUT_PAGE='https://github.com/AlexDaniel/oddmuse-alexine-data/blob/master/output'
 WIKI_LOCATION='https://oddmuse.org/wiki/'
 USER_NAME='Alexine'
 
-# Just in case Alexine can't find t/test.pl and the like.
-# See http://www.perlmonks.org/?node_id=1076113
-export PERL5LIB="$ODDMUSE_TEST_LOCATION"
-
 clean() {
   while popd &> /dev/null; do :; done # change directory back
   rmdir -- "$TEST_LOCK"