Add vec to Makefile and change cflags, remove vflags

Makefile

@@ -1,6 +1,5 @@
-CC=clang++
-CFLAGS=-pedantic -Wall -Wextra -Werror -fsanitize=address -fsanitize=undefined -ggdb -fsanitize=address
-VFLAGS=--show-leak-kinds=all --leak-check=full
+CC=clang
+CFLAGS=-pedantic -Wall -Wextra -fsanitize=address -fsanitize=undefined -ggdb -fsanitize=address
 OUT=
 
 btree.out: impls/btree.cpp
@@ -12,6 +11,9 @@ list.out: impls/list.cpp
 bsearch.out: impls/bsearch.cpp
 	$(CC) $(CFLAGS) $^ -o $@
 
+vec.out: impls/vec.c
+	$(CC) $(CFLAGS) $^ -o $@
+
 .PHONY: run
 run: $(OUT)
 	./$^