Switch bootstrap.pl and startbuild.pl to AMBuild.

Former-commit-id: 462765c926139c44a1c2922e0281b4653fad783a

support/buildbot/startbuild.pl

@@ -7,19 +7,22 @@ chdir($path);
 
 require 'helpers.pm';
 
-chdir('../../installer/builder');
+chdir('../../OUTPUT');
 
-my $output;
-if ($^O eq "linux" || $^O eq "darwin") {
-	$output = `mono builder.exe directions.info`;
-} else {
-	$output = `builder.exe directions.info`;
+my $argn = $#ARGV + 1;
+if ($argn > 0) {
+	$ENV{CC} = $ARGV[0];
+	$ENV{CXX} = $ARGV[0];
 }
-print $output . "\n";
 
-if (!($output =~ /Build succeeded/)) {
-	die "Build failed!\n";
-} else {
+system("ambuild --no-color 2>&1");
+
+if ($? != 0)
+{
+	die "Build failed: $!\n";
+}
+else
+{
 	exit(0);
 }