[sql] Import reference version of SQLite 3.7.6.3.

third_party/sqlite/sqlite-src-3070603/src/tokenize.c

 /*
 ** 2001 September 15
 **
 ** The author disclaims copyright to this source code.  In place of
 ** a legal notice, here is a blessing:
 **
 **    May you do good and not evil.
 **    May you find forgiveness for yourself and forgive others.
 **    May you share freely, never taking more than you give.
 **
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   while( pParse->pZombieTab ){
     Table *p = pParse->pZombieTab;
     pParse->pZombieTab = p->pNextZombie;
     sqlite3DeleteTable(db, p);
   }
   if( nErr>0 && pParse->rc==SQLITE_OK ){
     pParse->rc = SQLITE_ERROR;
   }
   return nErr;
 }