Clean up the output of abicompat weak mode

Clean up the output of abicompat weak mode

Remove ugly vertical spaces from the output of abicompat in weak
mode and adjust regression tests accordingly.

	* tools/abicompat.cc (perform_compat_check_in_weak_mode): Remove
	disgracious vertical spaces in the wording.
	* tests/data/test-abicompat/test5-fn-changed-report-0.txt: Adjust.
	* tests/data/test-abicompat/test6-var-changed-report-0.txt: Adjust.

Signed-off-by: Dodji Seketeli <dodji@redhat.com>