Copy files to a subfolder of output dir qmake

[vhptt]

In my project, I want to copy several files to subfolder of output directory.
I've searched and found an example:

EXTRA_BINFILES += $$PWD/log/myfiles.txt
for(FILE,EXTRA_BINFILES){
    QMAKE_POST_LINK += $$quote(cp $${FILE} $$OUT_PWD$$escape_expand(\n\t))
}

EXTRA_BINFILES += $$PWD/log/myfiles.txt
for(FILE,EXTRA_BINFILES){
    QMAKE_POST_LINK += $$quote(cp $${FILE} $$OUT_PWD$$escape_expand(\n\t))
}

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But that code above seems like copy myfiles.txt to output directory.
I want myfiles.txt to copy to dir OUT_PWD/log/
How can I do ?