rcc: Replace all occurrences of the marker in two-pass mode

The marker can occur legitimately twice e.g. on iOS
with universal binaries.

Change-Id: Ie334bcd104d45140ff969f44230e6de2212e8e25
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@digia.com>
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@theqtcompany.com>