[CMake] [PATCH] remove the -unpecified in the installed deb package name

[Kishore Jonnalagadda]

For debian packages (and others too?) It is odd to have the "-unspecified" 
extension to package names for the nameless component.

It is common to have packages like:
myapp
myapp-dev
myapp-data
etc.

But the application component usually does not have an extension. (Sometimes -
bin is used but is not common). This patch makes ensures that the -unspecified 
extension is not added to the package for the nameless component even though 
the generated file name has it. AFAIK The previous argument for avoiding the -
unspecified name was that it would overwrite the generated monolithic package 
file.
-- 
Cheers!
Kishore