Import SQLite 3.8.7.4.

third_party/sqlite/src/tool/pagesig.c

 /*
 ** 2013-10-01
 **
 ** 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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 }
 
 /*
 ** Find page signatures for all named files.
 */
 int main(int argc, char **argv){
   int i;
   for(i=1; i<argc; i++) computeSigs(argv[i]);
   return 0;
 }