Disable implicit function declaration warnings

This should address the issue found by:
https://lab.llvm.org/buildbot/#/builders/214/builds/844
diff --git a/MultiSource/Benchmarks/MiBench/network-patricia/CMakeLists.txt b/MultiSource/Benchmarks/MiBench/network-patricia/CMakeLists.txt
index c412039..950ba31 100644
--- a/MultiSource/Benchmarks/MiBench/network-patricia/CMakeLists.txt
+++ b/MultiSource/Benchmarks/MiBench/network-patricia/CMakeLists.txt
@@ -1,3 +1,4 @@
+list(APPEND CFLAGS -Wno-implicit-function-declaration)
 list(APPEND LDFLAGS -lm)
 set(RUN_OPTIONS large.udp)
 set(HASH_PROGRAM_OUTPUT 1)
diff --git a/MultiSource/Benchmarks/MiBench/network-patricia/Makefile b/MultiSource/Benchmarks/MiBench/network-patricia/Makefile
index e07b480..5a631a8 100644
--- a/MultiSource/Benchmarks/MiBench/network-patricia/Makefile
+++ b/MultiSource/Benchmarks/MiBench/network-patricia/Makefile
@@ -1,5 +1,6 @@
 LEVEL = ../../../..
 
+CFLAGS += -Wno-implicit-function-declaration
 PROG     = network-patricia
 LDFLAGS  = -lm
 RUN_OPTIONS = $(PROJ_SRC_DIR)/large.udp