cerbero: Also look for libfoo.lib when searching for DLLs

Harfbuzz is called libharfbuzz.dll even when built with MSVC because
that's what upstream wants.
3 jobs for dll-searching in 54 minutes and 30 seconds (queued for 27 minutes and 35 seconds)
Status Job ID Name Coverage
  Preparation
passed #63568
manifest

00:00:22

 
  Build
passed #63569
cerbero deps fedora x86_64

00:43:34

 
  Full Builds
passed #63570
build cerbero fedora x86_64

00:10:33