Fix link errors with GCC 10 and binutils 2.34 on Fedora

Fix the following compile errors:

	ld: ... multiple definition of `fs_device'; ... first defined here

and

	ld: ... multiple definition of `test_name'; ... first defined here.

These seem to result in a change in how GCC and the linker handle strong
and weak symbols.

Signed-off-by: W. Michael Petullo <mike@flyn.org>