[Buildroot] [git commit master] dependencies: fix tests on LD_LIBRARY_PATH

[Thomas Petazzoni]

commit: http://git.buildroot.net/buildroot/commit/?id=6b8b829508a98667267b6a5ec8342ddd1f2b3377
branch: http://git.buildroot.net/buildroot/commit/?id=refs/heads/master

Things like LD_LIBRARY_PATH=. or even LD_LIBRARY_PATH=.:/usr/lib were
not detected as incorrect.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>

Patch is too large, so refusing to show it