DrMemory: Suppress an uninit in Hunspell.

BUG=377728
TBR=groby@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/305573002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@272962 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/drmemory/suppressions_full.txt

@@ -2178,3 +2178,12 @@ name=bug_374410
 UNINITIALIZED READ
 name=bug_376814
 *!content::PepperPluginInstanceImpl::UpdateLayer
+
+UNINITIALIZED READ
+name=bug_377728
+...
+*!Hunspell::suggest
+*!HunspellEngine::FillSuggestionList
+*!SpellcheckLanguage::SpellCheckWord
+*!SpellCheck::SpellCheckWord
+*!SpellCheckTest_SpellCheckSuggestions_EN_US_Test::TestBody