[hatohol-db-initiator] Fix a problem in which libhatohol cannot be loaded.

libhatohol.so is a synbolic link to libhatohol.so.0.
However, the link is typically provided by the 'dev' package.
I.e. 'libhatohol.so' does not exist on machine for operation.
Merge pull request #633 from project-hatohol/fix-cant-load-libhatohol-from-db-initiator

[hatohol-db-initiator] Fix a problem in which libhatohol cannot be loaded