MSan: temporarily blacklist an uninit in CLD2.

Ignore a real uninit in CLD2 which is causing crashes in a
large number of tests. This is an exceptional measure to
unblock MSan deployment.

BUG=334448
TBR=eugenis@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/391253003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@283787 0039d316-1c4b-4281-b951-d872f2087c98

tools/msan/blacklist.txt

@@ -21,3 +21,6 @@ fun:*convolveVertically_SSE2*
 # (Both functions call __mm_maddubs_epi16()).
 fun:*ProcessPixelPairHelper*
 fun:*ProcessOnePixel*
+
+# An actual Chromium bug which is blocking our progress. http://crbug.com/334448
+fun:*UTF8GenericReplaceInternal*