Make Valgrind memcheck work in swarming.

tools/valgrind-webrtc/memcheck/suppressions.txt

 # This file is used in addition to the one already maintained in Chrome.
 # It acts as a place holder for future additions for WebRTC.
 # It must exist for the Python wrapper script to work properly.
 
 # There are three kinds of suppressions in this file.
 # 1. third_party libraries
 # 2. webrtc stuff
 # 3. libjingle stuff (talk folder)
 #-----------------------------------------------------------------------
 
@@ skipping 12 matching lines @@
    Memcheck:Uninitialized
    fun:_itoa_word
    fun:vfprintf
    fun:vsnprintf
    fun:snprintf
    ...
 }
 
 #-----------------------------------------------------------------------
 # webrtc stuff
+
+{
+   bug_6773_3
+   Memcheck:Uninitialized
+   fun:vfprintf
+   fun:vsnprintf
+   fun:snprintf
+   fun:_ZN7testing12_GLOBAL__N_126PrintByteSegmentInObjectToEPKhmmPSo
+   fun:_ZN7testing9internal220PrintBytesInObjectToEPKhmPSo
+   fun:_ZN7testing8internal14DefaultPrintToISt6vectorIN6webrtc4rtcp3Fir7RequestESaIS6_EEEEviNS0_13bool_constantILb0EEERKT_PSo
+   fun:_ZN7testing8internal20MatchPrintAndExplainIKSt6vectorIN6webrtc4rtcp3Fir7RequestESaIS6_EERS9_EEbRT_RKNS_7MatcherIT0_EEPNS_19MatchResultListenerE
+   fun:_ZNK7testing8internal29PredicateFormatterFromMatcherINS0_18ElementsAreMatcherISt5tupleIJNS0_13BothOfMatcherINS_18PolymorphicMatcherINS0_12FieldMatcherIN6webrtc4rtcp3Fir7RequestEjEEEENS5_INS6_ISA_hEEEEEESF_EEEEEclISt6vectorISA_SaISA_EEEENS_15AssertionResultEPKcRKT_
+   fun:_ZN6webrtc36RtcpPacketFirTest_TwoFciEntries_Test8TestBodyEv
+}
+{
+   bug_6773_2
+   Memcheck:Uninitialized
+   fun:vfprintf
+   fun:vsnprintf
+   fun:snprintf
+   fun:_ZN7testing12_GLOBAL__N_126PrintByteSegmentInObjectToEPKhmmPSo
+   fun:_ZN7testing9internal220PrintBytesInObjectToEPKhmPSo
+   fun:_ZN7testing8internal25UntypedFunctionMockerBase17UntypedInvokeWithEPKv
+   fun:_ZNK6webrtc11MockRtpRtcp11FlexfecSsrcEv
+   fun:_ZN6webrtc12PacketRouter16TimeToSendPacketEjtlbi
+   fun:_ZN6webrtc38PacketRouterTest_TimeToSendPacket_Test8TestBodyEv
+}
+{
+   bug_6773_1
+   Memcheck:Uninitialized
+   fun:vfprintf
+   fun:vsnprintf
+   fun:snprintf
+   fun:_ZN7testing12_GLOBAL__N_126PrintByteSegmentInObjectToEPKhmmPSo
+   fun:_ZN7testing9internal220PrintBytesInObjectToEPKhmPSo
+   fun:_ZN7testing8internal14DefaultPrintToISt6vectorIN6webrtc4rtcp3Fir7RequestESaIS6_EEEEviNS0_13bool_constantILb0EEERKT_PSo
+   fun:_ZN7testing8internal20MatchPrintAndExplainIKSt6vectorIN6webrtc4rtcp3Fir7RequestESaIS6_EERS9_EEbRT_RKNS_7MatcherIT0_EEPNS_19MatchResultListenerE
+   fun:_ZNK7testing8internal29PredicateFormatterFromMatcherINS0_18ElementsAreMatcherISt5tupleIJNS0_13BothOfMatcherINS_18PolymorphicMatcherINS0_12FieldMatcherIN6webrtc4rtcp3Fir7RequestEjEEEENS5_INS6_ISA_hEEEEEEEEEEEclISt6vectorISA_SaISA_EEEENS_15AssertionResultEPKcRKT_
+   fun:_ZN6webrtc28RtcpPacketFirTest_Parse_Test8TestBodyEv
+}
 {
    bug_3446
    Memcheck:Uninitialized
    fun:vp8cx_pick_filter_level_fast
    fun:vp8_loopfilter_frame
    fun:encode_frame_to_data_rate
    fun:vp8_get_compressed_data
    fun:vp8e_encode
    fun:vpx_codec_encode
    ...
@@ skipping 432 matching lines @@
    fun:pitch_search
    fun:celt_decode_lost
    fun:celt_decode_with_ec
    fun:opus_decode_frame
    ...
    fun:opus_decode_native
    fun:opus_decode
    fun:WebRtcOpus_Decode*
    ...
 }