QUuid::createUuid() is not unique per-process (based on qsrand())

If the following program is run on the same box twice within the same second, then the same UUID returned.
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#include <stdio.h>
#include <QUuid>
int main(int argc, char *argv[]) {
fprintf(stdout, "%s\n", qPrintable(QUuid::createUuid().toString()));
return 0;
}
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The reason for this is that qsrand() (not qsrand(int)) in 4.6.x in src/corelib/global/qglobal.cpp doesn't distinguish on something that is process specific. It has time-specific & thread-specific (thanks to QTBUG-3543) descrimination, but not process-specific.

To fix this, for both Unix & Windows, it should be as simple as adding in the process ID of the current process:
Unix: + quint32(getpid())
Windows: + quint32(GetCurrentProcessId())