Fix syncqt.pl not respecting #pragma qt_no_master_include in files with Windows line endings

We need to do the same chop trick that we do further down the file.

Change-Id: If4f832f375a11473e66adfcfa76a3b4504b3d406
Task-number: QTBUG-51324
Reviewed-by: Iikka Eklund <iikka.eklund@theqtcompany.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>

bin/syncqt.pl

@@ -182,6 +182,7 @@ sub shouldMasterInclude {
     if (open(F, "<$iheader")) {
         while (<F>) {
             chomp;
+            chop if /\r$/;
             return 0 if (/^\#pragma qt_no_master_include$/);
         }
         close(F);