gperftools-dev@testing: Library packages not being listed by pkgconf

It seems that the .pc files are missing a required "Description" section, as running pkg-config --validate libtcmalloc_minimal prints, among other things:

...
/usr/lib/pkgconfig/libtcmalloc_minimal.pc: warning: file does not declare a `Description' field
/usr/lib/pkgconfig/libtcmalloc_minimal.pc: warning: skipping invalid file
...

Workaround is running: echo 'Description: some text' >> /usr/lib/pkgconfig/libtcmalloc_minimal.pc. I guess replacing Summary with Description would work too...

This is a problem because build systems (such as Meson) rely on pkg-config to find libraries, and having that seemingly innocent warning causes failure to find the dependency.