Add customs CFLAGS to build, to workaround issue with umemcache

Makefile

@@ -6,7 +6,12 @@ TOOLS := $(addprefix $(ENV)/bin/,flake8 nosetests)
 # Hackety-hack around OSX system python bustage.
 # The need for this should go away with a future osx/xcode update.
 ARCHFLAGS = -Wno-error=unused-command-line-argument-hard-error-in-future
-INSTALL = ARCHFLAGS=$(ARCHFLAGS) $(ENV)/bin/pip install
+
+# Hackety-hack around errors duing compile of ultramemcached.
+CFLAGS = -Wno-error
+
+INSTALL = CFLAGS=$(CFLAGS) ARCHFLAGS=$(ARCHFLAGS) $(ENV)/bin/pip install
+
 
 .PHONY: all
 all: build