Xpetra: fix installation of headers

Fixes #5098

packages/xpetra/sup/CMakeLists.txt

@@ -76,6 +76,7 @@ TRILINOS_CREATE_CLIENT_TEMPLATE_HEADERS(${DIR})
 
 # Must glob the binary dir last to get all of the auto-generated headers
 SET_AND_INC_DIRS(DIR ${CMAKE_CURRENT_BINARY_DIR})
+APPEND_GLOB(HEADERS ${DIR}/*.hpp)
 
 #
 # Define the targets for package's library(s)