unitTest/fileTransfer: Fix buffer overflows

Wrong constructor was used, resulting in buffer overflows.  Although it's benign
because of read only of a data section, ASAN doesn't like it at all.

Also added missing newline at end of file.

Signed-off-by: Olivier Dion <olivier.dion@savoirfairelinux.com>
Change-Id: I15553855ea368ec00456db80abb065599adc0d49