Ltrace version changed, cannot find the old version on any debian mirrors. Patch by Nigel Kukard.

package/ltrace/ltrace.mk

@@ -5,7 +5,7 @@
 #############################################################
 LTRACE_VERSION=0.5
 LTRACE_SOURCE=ltrace_$(LTRACE_VERSION).orig.tar.gz
-LTRACE_PATCH=ltrace_$(LTRACE_VERSION)-3.diff.gz
+LTRACE_PATCH=ltrace_$(LTRACE_VERSION)-3.1.diff.gz
 LTRACE_SITE=$(BR2_DEBIAN_MIRROR)/debian/pool/main/l/ltrace
 LTRACE_DIR=$(BUILD_DIR)/ltrace-$(LTRACE_VERSION)
 LTRACE_BINARY=ltrace