Don't run git.

Index: Configure.pl
--- Configure.pl.orig
+++ Configure.pl
@@ -13,7 +13,7 @@ use FindBin;
 
 BEGIN {
     # Download / Update submodules
-    my $set_config = !qx{git config nqp.initialized};
+    my $set_config = 0; # !qx{git config nqp.initialized};
     if ( !-e '3rdparty/nqp-configure/LICENSE' ) {
         my $code = system($^X, 'tools/build/update-submodules.pl', Cwd::cwd(), @ARGV);
         exit 1 if $code >> 8 != 0;