Setting INSTALLDIRS to 'site' for perl 5.11+

Hello,

The Makefile.PL for ExtUtils::MakeMaker currently sets INSTALLDIRS to
'perl', so a CPAN update won't be shadowed by the core version in older
perls.

According to [1] this is no longer necessary for perl 5.11 and
following. Those will look in 'site' before 'perl', so normal CPAN
installations won't be shadowed by anything in core.

A patch for the Makefile.PL is attached.

[1]
https://github.com/rjbs/perltodo/blob/master/Supply-Patches-to-Fix-Install-Location.mkdn

regards,
-- 
Robert 'phaylon' Sedlacek

Perl 5 Consultant for
Shadowcat Systems Limited - http://shadowcat.co.uk/

diff --git a/Makefile.PL b/Makefile.PL
index b802c73..e54937e 100644
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -112,7 +112,7 @@ my $MM = WriteMakefile(
 
     CONFIGURE_REQUIRES => {},                  # We don't need ourself to install ourself.
     BUILD_REQUIRES     => { 'Data::Dumper' => 0, },
-    INSTALLDIRS        => 'perl',
+    INSTALLDIRS        => ($] < 5.011 ? 'perl' : 'site'),
     LICENSE            => 'perl',
     ABSTRACT_FROM      => "lib/$PACKAGE_FILE.pm",
     AUTHOR             => 'Michael G Schwern <[email protected]>',