Fix typo

Author: xxuejie

contracts/c-sphincs-all-in-one-lock/Makefile

@@ -52,7 +52,7 @@ CFLAGS += -I $(SPHINCS_PLUS_DIR) -I $(CUR_BUILD) -I $(cur_dir)/utils
 
 OS := $(shell uname -s)
 LDFLAGS :=
-if neq($(OS),Darwin)
+ifneq($(OS),Darwin)
 	LDFLAGS += -static -Wl,--gc-sections
 endif