tell perl_version

Author: scivision

+stdlib/platform_tell.m

@@ -24,6 +24,11 @@
   raw.dotnet_version = stdlib.dotnet_version();
 end
 
+if stdlib.has_perl()
+  raw.perl_version = stdlib.perl_version();
+  raw.perl_exe = stdlib.perl_exe();
+end
+
 pv = stdlib.python_version();
 if ~isempty(pv)
   raw.python_version = sprintf('%d.%d.%d', pv(1), pv(2), pv(3));