[sql] Import reference version of SQLite 3.8.7.4.

third_party/sqlite/sqlite-src-3080704/tool/speedtest8.c

 /*
 ** Performance test for SQLite.
 **
 ** This program reads ASCII text from a file named on the command-line
 ** and submits that text  to SQLite for evaluation.  A new database
 ** is created at the beginning of the program.  All statements are
 ** timed using the high-resolution timer built into Intel-class processors.
 **
 ** To compile this program, first compile the SQLite library separately
 ** will full optimizations.  For example:
@@ skipping 240 matching lines @@
 
 #ifdef HAVE_OSINST
   if( pVfs ){
     sqlite3_instvfs_destroy(pVfs);
     printf("vfs log written to %s\n", argv[0]);
   }
 #endif
 
   return 0;
 }