Move a previously Mac-specific Valgrind suppression for SQLite to Linux as well.

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 # running overnight and removing outdated bugs/suppressions.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 153 matching lines @@
 }
 {
    FIXME IPCing uninitialized data
    Memcheck:Param
    socketcall.sendmsg(msg.msg_iov[i])
    fun:sendmsg
    fun:_ZN3IPC7Channel11ChannelImpl4SendEPNS_7MessageE
 }
 
 {
+   # Strange...
+   bug_20653a
+   Memcheck:Param
+   write(buf)
+   ...
+   fun:sqlite3OsWrite
+   fun:pager_write_pagelist
+   fun:sqlite3PagerCommitPhaseOne
+}
+{
    # There is a fix in mainline, http://www.sqlite.org/cvstrac/chngview?cn=5968
    # See also http://article.gmane.org/gmane.comp.db.sqlite.general/43177
    SQLite write
    Memcheck:Param
    write(buf)
    ...
    fun:writeJournalHdr
 }
 
 # Fixed in newer SQLite
@@ skipping 1027 matching lines @@
    bug_22109
    Memcheck:Leak
    fun:_Znwj
    fun:_ZNSs4_Rep9_S_createEjjRKSaIcE
    fun:_ZNSs4_Rep8_M_cloneERKSaIcEj
    fun:_ZNSs7reserveEj
    fun:_ZNSs6appendEPKcj
    fun:_Z14StringAppendVTISsEvPT_PKNS0_10value_typeEPc
    fun:_Z12StringPrintfPKcz
 }