[sql] Import reference version of SQLite 3.10.2.

third_party/sqlite/sqlite-src-3100200/src/hash.c

 /*
 ** 2001 September 22
 **
 ** 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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   pH->count++;
   if( pH->count>=10 && pH->count > 2*pH->htsize ){
     if( rehash(pH, pH->count*2) ){
       assert( pH->htsize>0 );
       h = strHash(pKey) % pH->htsize;
     }
   }
   insertElement(pH, pH->ht ? &pH->ht[h] : 0, new_elem);
   return 0;
 }