QNX: Add QNX Abi to the library collection function

Since QNX was split into it's own Abi (QnxOS), it is no longer
piggybacking on the UnixOS Abi. When this change occurred,
there was no change done to collectLibraryData function so on
QNX we were no longer seeing libs created from projects that
were subdirs of a main project.

Related QnxOS change: e69c2eb

Change-Id: Ibb4ff8932ca5d6eea317946aecb53f58ddccc0ea
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/qmakeprojectmanager/qmakeproject.cpp

@@ -1202,6 +1202,7 @@ void QmakeProject::collectLibraryData(const QmakeProFile *file, DeploymentData &
     }
     case Abi::LinuxOS:
     case Abi::BsdOS:
+    case Abi::QnxOS:
     case Abi::UnixOS:
         if (!(isPlugin && config.contains(QLatin1String("no_plugin_name_prefix"))))
             targetFileName.prepend(QLatin1String("lib"));