[MaL] Use old-style target link libs for MKL.

This is partially reverting 071c19a9
"[CMake] Use generator expression for target_link_libraries()".

For the ninja build system when using shared libraries the
generator expressions produce erroneous build.ninja file, and
ninja generates an error:

```
CMake Error:
  Running

   '/usr/bin/ninja' '-C' '/home/naumov/w/ogs/r' '-t' 'recompact'

  failed with:

   ninja: error: build.ninja:8128: bad $-escape (literal $ must be written as $$)
```

Reason unknown.