Add MYMETA.yml to dual-life files to ignore

Once the toolchain start generating this regularly, we want to make sure
it doesn't get copied if the source directory isn't clean.

diff --git a/Porting/Maintainers.pl b/Porting/Maintainers.pl
index 6405f23..cba3cfa 100755 (executable)
--- a/Porting/Maintainers.pl
+++ b/Porting/Maintainers.pl
@@ -100,7 +100,7 @@ use File::Glob qw(:case);
     ANNOUNCE Announce Artistic AUTHORS BENCHMARK BUGS Build.PL
     CHANGELOG ChangeLog CHANGES Changes COPYING Copying CREDITS
     GOALS HISTORY INSTALL INSTALL.SKIP LICENSE Makefile.PL
-    MANIFEST MANIFEST.SKIP META.yml NEW NOTES ppport.h README
+    MANIFEST MANIFEST.SKIP META.yml MYMETA.yml NEW NOTES ppport.h README
     SIGNATURE THANKS TODO Todo VERSION WHATSNEW
 );