" i could not link these file"

Of course you can't.
The Linker accepts Object files as input - so if you want to Link them, you will have to first convert them to your Linker's Object format. Michael has already shown the way to do this.

Alternatively, you could convert the binaries to Intel Hex and then merge the hexfiles with the Hex file from your Linked code - this is simply a matter of file concatenation