The C example now has its own makefile.

c-example/makefile

@@ -0,0 +1,7 @@
+all: build
+
+build:
+	gcc -o example ./example.c -L ../zig-out/lib/ -lhexa
+
+run: build
+	LD_LIBRARY_PATH=../zig-out/lib/ ./example

makefile

@@ -2,9 +2,3 @@ all: build
 
 build:
 	zig build
-
-build-test: build
-	gcc -o example c-example/example.c -L ./zig-out/lib/ -lhexa
-
-run-test: build
-	LD_LIBRARY_PATH=./zig-out/lib/ ./example