[sql] Import reference version of SQLite 3.10.2.

third_party/sqlite/sqlite-src-3100200/test/varint.test

 # 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.
 #
 #***********************************************************************
@@ skipping 12 matching lines @@
 foreach start {0 100 10000 1000000 0x10000000} {
   foreach mult {1 0x10 0x100 0x1000 0x10000 0x100000 0x1000000 0x10000000} {
     foreach incr {1 500 10000 50000000} {
       incr cnt
       do_test varint-1.$cnt {
         btree_varint_test $start $mult 5000 $incr
       } {}
     }
   }
 }