package/perf: if zstd is enabled, depend on it

Enables the "-z" flag.

Signed-off-by: Václav Kubernát <sir.venceslas@gmail.com>
Reviewed-by: Jan Kundrát <jan.kundrat@cesnet.cz>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/linux-tools/linux-tool-perf.mk.in

@@ -69,6 +69,10 @@ else
 PERF_MAKE_FLAGS += NO_LIBAUDIT=1
 endif
 
+ifeq ($(BR2_PACKAGE_ZSTD),y)
+PERF_DEPENDENCIES += zstd
+endif
+
 ifeq ($(BR2_PACKAGE_LIBUNWIND),y)
 PERF_DEPENDENCIES += libunwind
 else