Add missing call to find_dependency(TBB ..) to resolve indirect dependencies

Author: theblackunknown

pxr/pxrConfig.cmake.in

@@ -18,6 +18,8 @@ set(PXR_VERSION "@PXR_VERSION@")
 
 include(CMakeFindDependencyMacro)
 
+find_dependency(TBB)
+
 # If Python support was enabled for this USD build, find the import
 # targets by invoking the appropriate FindPython module. Use the same
 # LIBRARY and INCLUDE_DIR settings from the original build if they