Fix the way LD_LIBRARY_PATH is set in runtest.py
Fix the way LD_LIBRARY_PATH is set in runtest.py

Fix r210376, which set LD_LIBRARY_PATH only for it to be overwritten later.

BUG=258031
R=glider@chromium.org, maruel@chromium.org

Review URL: https://chromiumcodereview.appspot.com/18337005

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@210381 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build