Updated example makefile

 *  Make would fail due to missing build directory. Now it doesn't try to delete build/

examples/makefile

@@ -2,8 +2,9 @@
 #   Unity Project - A Test Framework for C
 #   Copyright (c) 2007 Mike Karlesky, Mark VanderVoord, Greg Williams
 #   [Released under MIT License. Please refer to license.txt for details]
-# ========================================== 
+# ==========================================
 
+UNITY_ROOT=..
 C_COMPILER=gcc
 TARGET_BASE1=test1
 TARGET_BASE2=test2
@@ -14,13 +15,13 @@ else
 endif
 TARGET1 = $(TARGET_BASE1)$(TARGET_EXTENSION)
 TARGET2 = $(TARGET_BASE2)$(TARGET_EXTENSION)
-SRC_FILES1=../src/unity.c src/ProductionCode.c  test/TestProductionCode.c  test/no_ruby/TestProductionCode_Runner.c
-SRC_FILES2=../src/unity.c src/ProductionCode2.c test/TestProductionCode2.c test/no_ruby/TestProductionCode2_Runner.c
-INC_DIRS=-Isrc -I../src
+SRC_FILES1=$(UNITY_ROOT)/src/unity.c src/ProductionCode.c  test/TestProductionCode.c  test/no_ruby/TestProductionCode_Runner.c
+SRC_FILES2=$(UNITY_ROOT)/src/unity.c src/ProductionCode2.c test/TestProductionCode2.c test/no_ruby/TestProductionCode2_Runner.c
+INC_DIRS=-Isrc -I$(UNITY_ROOT)/src
 SYMBOLS=-DTEST
 
 ifeq ($(OS),Windows_NT)
-	CLEANUP = del /F /Q build\* && del /F /Q $(TARGET1) && del /F /Q $(TARGET2)
+	CLEANUP = del /F /Q $(TARGET1) && del /F /Q $(TARGET2)
 else
 	CLEANUP = rm -f build/*.o ; rm -f $(TARGET1) ; rm -f $(TARGET2)
 endif
@@ -37,4 +38,4 @@ default:
 
 clean:
 	$(CLEANUP)
-	
+