package/tcpreplay: select musl-fts if needed

Fix the following build failure raised since commit
4138151e447e69771e2579ea5a3daa89c56d41a8:

Makefile:576: *** musl-fts is in the dependency chain of tcpreplay that has added it to its _DEPENDENCIES variable without selecting it or depending on it from Config.in.  Stop.

Fixes:
 - http://autobuild.buildroot.org/results/629aabd00cebcad980bf707a70642a67ad4472ca

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

package/tcpreplay/Config.in

@@ -2,6 +2,7 @@ config BR2_PACKAGE_TCPREPLAY
 	bool "tcpreplay"
 	depends on BR2_USE_MMU # fork()
 	select BR2_PACKAGE_LIBPCAP
+	select BR2_PACKAGE_MUSL_FTS if !BR2_TOOLCHAIN_USES_GLIBC
 	help
 	  Tcpreplay is a tool for replaying network traffic from files
 	  saved with tcpdump or other tools which write pcap(3) files.