Fix qmake's sed functionality for input containing CR+LF newlines

QTextStream, reading a file with CR+LF newlines from an stdio FILE
handle that was opened without "b", will always return false in atEnd().

Changing the open mode from "r" to "rb" works around the issue.

Task-number: QTBUG-80443
Change-Id: Ib2eafc0c4c6a6d2bcaeea3036474549d2d9e1511
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>

qmake/main.cpp

@@ -154,7 +154,7 @@ static int doSed(int argc, char **argv)
         FILE *f;
         if (!strcmp(inFile, "-")) {
             f = stdin;
-        } else if (!(f = fopen(inFile, "r"))) {
+        } else if (!(f = fopen(inFile, "rb"))) {
             perror(inFile);
             return 1;
         }