use /usr/local/bin/efile from devel/libmagic

Index: t/oo-api.t
--- t/oo-api.t.orig
+++ t/oo-api.t
@@ -92,7 +92,7 @@ SKIP:
 
 sub _get_magic_file_path {
     my @paths;
-    for (`file -v`) {    ## no critic (ProhibitBacktickOperators)
+    for (`efile -v`) {    ## no critic (ProhibitBacktickOperators)
         chomp;
         next unless m/\Amagic file from (.*)/;
 
