smalltalk: Fix the library name, it is sqlite3

Fixes:
ERROR: Nothing PROVIDES 'libsqlite3' (but /home/builder/jenkins/workspace/Yocto-Dora/label/OE/meta-smalltalk/recipes-smalltalk/smalltalk/smalltalk_3.2.91.1.bb DEPENDS on or otherwise requires it). Close matches:
  sqlite3