extraneous linkage to libpfm4

[dbarry9]

In the Makefile for the CUDA component tests, there is the line
PAPILIB += -L../../../libpfm4/lib -lpfm
which is used for linking for each of the tests.

This linkage is not necessary for the CUDA component tests, and it causes an error when the 'perf_event' and 'perf_event_uncore' components are disabled because libpfm4 is not built.

This may exist in other components' tests, as well.