perf build: Suppress 'rm dlfilter' build message

The following build message:

	rm dlfilters/dlfilter-test-api-v0.o

is unwanted.

The object file is being treated as an intermediate file and being
automatically removed. Mark the object file as .SECONDARY to prevent
removal and hence the message.

Requested-by: Arnaldo Carvalho de Melo <>
Signed-off-by: Adrian Hunter <>
Cc: Jiri Olsa <>
Signed-off-by: Arnaldo Carvalho de Melo <>
1 file changed