The makespec inits QMAKE_LFLAGS_PLUGIN to the same as QMAKE_LFLAGS_SHLIB,
which will create a dynamic library by passing -dynamiclib. The advantage of
creating a proper bundle (MH_BUNDLE) instead of a dynamic library (MH_DYLIB)
is that bundles can be unloaded completely by the host application.
Change-Id: I03b39b704c09213f40a4cb84f5794bf6b3669fc0
Reviewed-by: Jake Petroules <jake.petroules@petroules.com>
