lint: Get absolute path in compare_output

The classes in $(top)/Makefile uses $(abspath) to get the path.
The $(abspath) can not resolve symlink. If the coreboot is located
in a symlink directory, the run_printall produces the absolute
path while the $PWD just produces the path with symlink. Use
`pwd -P` to get the abs path.

Change-Id: Icf6b364d030c14a9c78991767b17dafc701baf3c
Signed-off-by: Zheng Bao <zheng.bao@amd.com>
Signed-off-by: Zheng Bao <fishbaozi@gmail.com>
Reviewed-on: http://review.coreboot.org/1551
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

0 files changed, 0 insertions, 0 deletions