Tweak precondition checks

Tweaked the precondition checks a bit so they don't complain about missing repos; which will not be present for all users upon initial run of `make`.

check-versions.pl

@@ -25,7 +25,7 @@
 for my $name ( keys %$reqs ) {
     my $repo = $ob->{ $name };
     if( !$repo ) {
-        #print "repos/$name is missing\n";
+        print "repos/$name is missing\n";
         next;
     }
     my $remote = $repo->{remote};

get-version-info.sh

@@ -20,9 +20,9 @@ def git_info( dir ):
   try:
     res = subprocess.check_output( cmd, stderr=subprocess.STDOUT )
   except subprocess.CalledProcessError as e:
-    sys.stderr.write( e.output )
+    #sys.stderr.write( e.output )
     return {
-      "error": e.output
+      "error": "missing"#e.output
     }
 
   remote = subprocess.check_output( ["/usr/bin/git", "-C", "./" + dir, "remote","-v"] )

makefile_preflight.pl

@@ -1,4 +1,4 @@
-#!/bin/perl -w
+#!/usr/bin/perl -w
 use strict;
 my $brew_check = `./util/brewser.pl checkdeps stf_ios_support.rb`;
 if( $brew_check =~ m/Missing/ ) {