Command.stdoutPath does not handle binary output correctly

Rules trying to output binary data via the stdoutPath variable on the Command object does not get the correct output.

A minimal example using cat is provided in the attachment:

• myfile.bin is a 1024 byte file of random binary data
• myfile.txt is a short text file
• build.qbs take have one rule which attempts to concat both files with itself twice and send the output to stdoutPath.
• Only the text file is concatenated properly. The binary output file is way to small (only 218 bytes)