Updating LSan third party suppressions.

Several new third party suppressions have been updated in
Chromium's suppressions file:
https://code.google.com/p/chromium/codesearch#chromium/src/tools/lsan/suppressions.txt
These will solve some of the errors we're seeing at
http://build.chromium.org/p/client.webrtc.fyi/builders/Linux%20LSan%20%28and%20ASan%29/
which needs to be resolved before switching our
ASan bot to recipes (since the recipe ASan configuration
has LSan enabled by default).

BUG=2527,2528,3345,3346
TEST=Successfully ran the following tests under ASan+LSan locally:
libjingle_media_unittest
libjingle_p2p_unittest
libjingle_peerconnection_unittest
libjingle_unittest

R=pbos@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/14489005

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6148 4adac7df-926f-26a2-2b94-8c16560cd09d

tools/lsan/suppressions.txt

@@ -8,6 +8,26 @@
 # Leak reported in libstdc++
 leak:std::string::_Rep::_S_create
 
+# False positives in libfontconfig. http://crbug.com/39050
+leak:libfontconfig
+
+# Leaks in Nvidia's libGL.
+leak:libGL.so
+
+# XRandR has several one time leaks.
+leak:libxrandr
+
+# The NSS suppressions above will not fire when the fast stack unwinder is used,
+# because it can't unwind through NSS libraries. Apply blanket suppressions for
+# now.
+leak:libnssutil3
+leak:libnspr4
+leak:libnss3
+leak:libplds4
+leak:libnssckbi
+
+# xrandr leak. http://crbug.com/119677
+leak:XRRFindDisplay
 
 #### Actual bugs in WebRTC code ####