Find the path to the application identified by app_name. For example if the application
is "gda-sql", then calling this function will return
"/your/prefix/bin/gda-sql-5.0" if Libgda is installed in
the "/your/prefix" prefix (which would usually be "/usr"), and for the ABI version 5.0.
Find the path to the application identified by app_name. For example if the application is "gda-sql", then calling this function will return "/your/prefix/bin/gda-sql-5.0" if Libgda is installed in the "/your/prefix" prefix (which would usually be "/usr"), and for the ABI version 5.0.