Another workaround for GHC linking error "unknown symbol"
Another workaround for GHC linking error "unknown symbol"

This error appears after adding the dependency to lifted-base.
See also #683 and ee7caf27.

I surmise that something like this is happening: Some code, that uses
the library, is only referenced through Template Haskell. A probable bug
in GHC linker fails to notice it and doesn't include the library when
linking, causing the error. Referencing the library explicitly in THH.hs
solves the problem.

Signed-off-by: Petr Pudlak <9d19625f8ee825a2c398462ed335cbcf98f79c32@google.com>
Reviewed-by: Klaus Aehlig <4ce51de36d9068cd7db2eec1151e0f3f95419008@google.com>

ganeti/ganeti,yiannist/ganeti,bitemyapp/ganeti,onponomarev/ganeti,mbakke/ganeti,leshchevds/ganeti,onponomarev/ganeti,ganeti/ganeti,apyrgio/ganeti,ganeti-github-testing/ganeti-test-1,leshchevds/ganeti,mbakke/ganeti,ganeti-github-testing/ganeti-test-1,andir/ganeti,apyrgio/ganeti,andir/ganeti,dimara/ganeti,bitemyapp/ganeti,grnet/snf-ganeti,dimara/ganeti,grnet/snf-ganeti,yiannist/ganeti,leshchevds/ganeti,mbakke/ganeti,yiannist/ganeti,andir/ganeti,ganeti/ganeti