cerbero: Fix logic for finding plugin DLLs
f[3:] is wrong because f is lib/gstreamer-1.0/libfoo.dll
Because of this, plugins built with MSVC weren't getting included in the binary release at all.
f[3:] is wrong because f is lib/gstreamer-1.0/libfoo.dll
Because of this, plugins built with MSVC weren't getting included in the binary release at all.