ltrace: unavailable for ARC architecture

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/ltrace/Config.in

@@ -1,6 +1,6 @@
 config BR2_PACKAGE_LTRACE
 	bool "ltrace"
-	depends on !(BR2_avr32 || BR2_mips || BR2_sh || BR2_sh64 || BR2_xtensa || BR2_aarch64)
+	depends on !(BR2_avr32 || BR2_mips || BR2_sh || BR2_sh64 || BR2_xtensa || BR2_aarch64 || BR2_arc)
 	select BR2_PACKAGE_LIBELF
 	help
 	  Debugging program which runs a specified command until it exits.