[perl-gtk2-gladexml] Makefile.PL: added META_MERGE block with module deps

[Brian Manning <bmanning src gnome org>]

commit b6c899b7f09fb14dad53b7dca36430713fee3607
Author: Brian Manning <bmanning src gnome org>
Date:   Wed Oct 14 22:23:41 2020 -0700

    Makefile.PL: added META_MERGE block with module deps
    
    - This fixes RT#107572

 Makefile.PL | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)
---
diff --git a/Makefile.PL b/Makefile.PL
index 7aa74f7..a08b26b 100644
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -18,10 +18,10 @@ our %build_reqs = (
 );
 
 our %pre_reqs = (
-       Glib::                => $build_reqs{'perl-Glib'},
-       Gtk2::                => $build_reqs{'perl-Gtk2'},
-       ExtUtils::Depends::   => $build_reqs{'perl-ExtUtils-Depends'},
-       ExtUtils::PkgConfig:: => $build_reqs{'perl-ExtUtils-PkgConfig'},
+       'Glib'                  => $build_reqs{'perl-Glib'},
+       'Gtk2'                  => $build_reqs{'perl-Gtk2'},
+       'ExtUtils::Depends'     => $build_reqs{'perl-ExtUtils-Depends'},
+       'ExtUtils::PkgConfig'   => $build_reqs{'perl-ExtUtils-PkgConfig'},
 );
 
 # Writing a fake Makefile ensures that CPAN will pick up the correct
@@ -30,7 +30,7 @@ unless (eval "use ExtUtils::Depends '$build_reqs{'perl-ExtUtils-Depends'}';"
            . "use ExtUtils::PkgConfig '$build_reqs{'perl-ExtUtils-PkgConfig'}';"
            . "use Glib::MakeHelper;"
            # just seeing if Glib is available isn't enough, make sure
-           # it's recent enough, too 
+           # it's recent enough, too
            . "use Glib '$build_reqs{'perl-Glib'}';"
            . "use Gtk2 '$build_reqs{'perl-Gtk2'}';"
            . "1") {
@@ -71,6 +71,9 @@ WriteMakefile(
     ABSTRACT_FROM => 'GladeXML.pm',
     PREREQ_PM     => \%pre_reqs,
     XSPROTOARG    => '-noprototypes',
+    META_MERGE    => {
+       configure_requires => \%pre_reqs,
+    },
     $gladexml->get_makefile_vars,
 );