[sql] Import reference version of SQLite 3.8.7.4.

third_party/sqlite/sqlite-src-3080704/ext/fts2/README.tokenizers

 
 1. FTS2 Tokenizers
 
   When creating a new full-text table, FTS2 allows the user to select
   the text tokenizer implementation to be used when indexing text
   by specifying a "tokenizer" clause as part of the CREATE VIRTUAL TABLE
   statement:
 
     CREATE VIRTUAL TABLE <table-name> USING fts2(
       <columns ...> [, tokenizer <tokenizer-name> [<tokenizer-args>]]
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         sqlite3_bind_text(pStmt, 1, zName, -1, SQLITE_STATIC);
         if( SQLITE_ROW==sqlite3_step(pStmt) ){
           if( sqlite3_column_type(pStmt, 0)==SQLITE_BLOB ){
             memcpy(pp, sqlite3_column_blob(pStmt, 0), sizeof(*pp));
           }
         }
       
         return sqlite3_finalize(pStmt);
       }