Add suppression for yet another SVGNames::init() -related leak...

tools/valgrind/memcheck/suppressions.txt

 # There are three kinds of suppressions in this file.
 # 1. third party stuff we have no control over
 #
 # 2. intentional unit test errors, or stuff that is somehow a false positive
 # in our own code, or stuff that is so trivial it's not worth fixing
 #
 # 3. Suppressions for real chromium bugs that are not yet fixed.
 # These should all be in chromium's bug tracking system (but a few aren't yet).
 # Periodically we should sweep this file and the bug tracker clean by
 # running overnight and removing outdated bugs/suppressions.
@@ skipping 939 matching lines @@
 }
 {
    bug_17795
    Memcheck:Leak
    fun:_Znwj
    fun:_ZN3WTF9HashTableIPN7WebCore13QualifiedName17QualifiedNameImplES4_NS_17IdentityExtractorIS4_EENS1_17QualifiedNameHashENS_10HashTraitsIS4_EES9_E18addPassingHashCodeINS1_23QualifiedNameComponentsESC_NS_24HashSetTranslatorAdapterIS4_S9_SC_NS1_25QNameComponentsTranslatorEEEEESt4pairINS_17HashTableIteratorIS4_S4_S6_S7_S9_S9_EEbERKT_RKT0_
    fun:_ZN3WTF7HashSetIPN7WebCore13QualifiedName17QualifiedNameImplENS1_17QualifiedNameHashENS_10HashTraitsIS4_EEE3addINS1_23QualifiedNameComponentsENS1_25QNameComponentsTranslatorEEESt4pairINS_24HashTableIteratorAdapterINS_9HashTableIS4_S4_NS_17IdentityExtractorIS4_EES5_S7_S7_EES4_EEbERKT_
    fun:_ZN7WebCore13QualifiedNameC1ERKNS_12AtomicStringES3_S3_
    fun:_ZN7WebCore8SVGNames4initEv
 }
+{
+   bug_17996
+   Memcheck:Leak
+   ...
+   fun:_ZN7WebCore10StringImplnwEj
+   fun:_ZN3WTF9HashTableIPN7WebCore10StringImplES3_NS_17IdentityExtractorIS3_EENS1_10StringHashENS_10HashTraitsIS3_EES8_E18addPassingHashCodeIPKcSC_NS_24HashSetTranslatorAdapterIS3_S8_SC_NS1_17CStringTranslatorEEEEESt4pairINS_17HashTableIteratorIS3_S3_S5_S6_S8_S8_EEbERKT_RKT0_
+   fun:_ZN3WTF7HashSetIPN7WebCore10StringImplENS1_10StringHashENS_10HashTraitsIS3_EEE3addIPKcNS1_17CStringTranslatorEEESt4pairINS_24HashTableIteratorAdapterINS_9HashTableIS3_S3_NS_17IdentityExtractorIS3_EES4_S6_S6_EES3_EEbERKT_
+   fun:_ZN7WebCore12AtomicString3addEPKc
+   fun:_ZN7WebCore12AtomicStringC1EPKc
+   fun:_ZN7WebCore8SVGNames4initEv
+}