Update libpfm4 to commit 29bd24 #974

Job	Run time
papi_clang_analysis	6m 53s
papi_component_amd (rocm, yes)	7m 1s
papi_component (perf_event, yes)	8m 8s
papi_component_amd (rocm, no)	6m 16s
papi_component_nvidia (cuda, yes)	1m 9s
papi_component (perf_event, no)	7m 0s
papi_spack	20m 23s
papi_component_amd (rocm_smi, yes)	6m 24s
papi_component_nvidia (cuda, no)	59s
papi_component (lmsensors, yes)	8m 49s
papi_component_amd (rocm_smi, no)	5m 38s
papi_component_nvidia (nvml, yes)	12m 2s
papi_component (lmsensors, no)	11m 15s
papi_component_nvidia (nvml, no)	6m 16s
papi_component (io, yes)	7m 46s
papi_component (io, no)	6m 53s
papi_component (net, yes)	12m 30s
papi_component (net, no)	6m 55s
papi_component (powercap, yes)	11m 29s
papi_component (powercap, no)	9m 35s
papi_component (appio, yes)	7m 54s
papi_component (appio, no)	7m 22s
papi_component (coretemp, yes)	7m 42s
papi_component (coretemp, no)	10m 38s
papi_component (stealtime, yes)	9m 12s
papi_component (stealtime, no)	10m 33s
	3h 36m 42s

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