Copy files more generically

configs/*: Copy all files that do not need a rename generically (not specifying a destination file name). Do not rename vmlinuz-linux to vmlinuz or vmlinuz.efi (as this serves no purpose and makes the scripts more complicated). Do not rename microcode (i.e. {amd,intel}-ucode.img) when copying them and change all boot loader configuration files that assume a renamed microcode image. Do not rename memtest.bin to memtest (as this serves no purpose and makes the scripts more complicated). Copy license files for {amd,intel}-ucode and memtest more generically by placing them into subdirectories with the same name as the package (to circumenvent overwriting one other).

Closes #33 (closed)