Fix tar error when packing files

Multiple quoted files are treated by tar as one file.
Test: ran `./gen-bios-tar -v "rev1" -m "MyTestMachine" bios.bin`

Signed-off-by: Glukhov Mikhail <mikl@greenfil.ru>
Change-Id: I1a0ad1d0dd89d8830a50fd059acac285156f04da
1 file changed