perf build: Fixes for LIBTRACEEVENT_DYNAMIC

If LIBTRACEEVENT_DYNAMIC is enabled then avoid the install step for
the plugins. If disabled correct DESTDIR so that the plugins are
installed under <lib>/traceevent/plugins.

Fixes: ef019df01e ("perf build: Install libtraceevent locally when building")
Reported-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20221205225940.3079667-2-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/Makefile.perf

@@ -884,7 +884,7 @@ $(LIBTRACEEVENT_DYNAMIC_LIST): libtraceevent_plugins
 
 install-traceevent-plugins: libtraceevent_plugins
 	$(Q)$(MAKE) -C $(LIBTRACEEVENT_PLUGINS_DIR) O=$(LIBTRACEEVENT_PLUGINS_OUTPUT) \
-		DESTDIR=$(LIBTRACEEVENT_PLUGINS_DESTDIR) prefix= \
+		DESTDIR=$(DESTDIR_SQ)$(prefix) prefix= \
 		$(LIBTRACEEVENT_FLAGS) install
 endif
 
@@ -1093,7 +1093,11 @@ install-tests: all install-gtk
 		$(INSTALL) tests/shell/coresight/*.sh '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/tests/shell/coresight'
 	$(Q)$(MAKE) -C tests/shell/coresight install-tests
 
-install-bin: install-tools install-tests install-traceevent-plugins
+install-bin: install-tools install-tests
+
+ifndef LIBTRACEEVENT_DYNAMIC
+install-bin: install-traceevent-plugins
+endif
 
 install: install-bin try-install-man