package/linux-tools: perf needs dynamic library

traceevent needs dynamic library since its addition in kernel 3.14 and
https://github.com/torvalds/linux/commit/c877bbd8eceb14c5eac6779cc804fa8b34044736:

event-plugin.c:10:10: fatal error: dlfcn.h: No such file or directory
   10 | #include <dlfcn.h>
      |          ^~~~~~~~~

Fixes:
 - http://autobuild.buildroot.org/results/24206071721479a6ba4d0267e7e20ef9498e1e05

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/linux-tools/Config.in

@@ -50,6 +50,7 @@ config BR2_PACKAGE_LINUX_TOOLS_PCI
 config BR2_PACKAGE_LINUX_TOOLS_PERF
 	bool "perf"
 	depends on BR2_TOOLCHAIN_HAS_SYNC_4
+	depends on !BR2_STATIC_LIBS # dlfcn.h
 	select BR2_PACKAGE_LINUX_TOOLS
 	help
 	  perf (sometimes "Perf Events" or perf tools, originally
@@ -69,6 +70,10 @@ config BR2_PACKAGE_LINUX_TOOLS_PERF
 
 	  https://perf.wiki.kernel.org/
 
+comment "perf needs a toolchain w/ dynamic library"
+	depends on BR2_TOOLCHAIN_HAS_SYNC_4
+	depends on BR2_STATIC_LIBS
+
 if BR2_PACKAGE_LINUX_TOOLS_PERF
 
 config BR2_PACKAGE_LINUX_TOOLS_PERF_TUI