Fix LD_LIBRARY_PATH not set error

common/update-test-path adds the $TESTDIR/$ARCH/lib directory to LD_LIBRARY_PATH, which can be unset before calling it. In this case the connman-pan-tethering.sh script, which sets set -eu fails with error:

./connman-pan-tethering.sh: 15: common/update-test-path: LD_LIBRARY_PATH: parameter not set

Move call to common/update-test-path before set -eu to allow unset LD_LIBRARY_PATH.

Signed-off-by: Frédéric Danis frederic.danis@collabora.com