Fix typo in exclude test name

BUG=403533
TBR=gpdavis.chromium@gmail.com

Review URL: https://codereview.chromium.org/474743002

Cr-Commit-Position: refs/heads/master@{#289429}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@289429 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/gtest_exclude/unit_tests.gtest_linux.txt

@@ -31,4 +31,4 @@ CpuInfoProviderTest.*
 NTPUserDataLoggerTest.TestLogging
 
 # http://crbug.com/403533
-ExtensionPathUtilTest.BasicPrettifyPath
+ExtensionPathUtilTest.BasicPrettifyPathTest