Add OBJDIR optional build variable to the BULD build system module, to allow the user project to relocate the output object and dependency files to a different directory.

Demos/Device/ClassDriver/makefile

@@ -23,7 +23,9 @@ ifeq ($(MAKELEVEL), 10)
 endif
 
 all:
+ifeq ($(OBJDIR),)
 	@$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) clean all;)
+endif
 
 %:
 	@$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) $@;)

Demos/Device/Incomplete/TestAndMeasurement/makefile

@@ -19,7 +19,7 @@ TARGET       = TestAndMeasurement
 SRC          = $(TARGET).c Descriptors.c $(LUFA_SRC_USB) $(LUFA_SRC_USBCLASS)
 LUFA_PATH    = ../../../../LUFA/
 CC_FLAGS     = -DUSE_LUFA_CONFIG_HEADER -IConfig/
-LD_FLAGS     =
+LD_FLAGS     = 
 
 # Default target
 all:

Demos/Device/LowLevel/makefile

@@ -23,7 +23,9 @@ ifeq ($(MAKELEVEL), 10)
 endif
 
 all:
+ifeq ($(OBJDIR),)
 	@$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) clean all;)
+endif
 
 %:
 	@$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) $@;)

Demos/DualRole/ClassDriver/makefile

@@ -23,7 +23,9 @@ ifeq ($(MAKELEVEL), 10)
 endif
 
 all:
+ifeq ($(OBJDIR),)
 	@$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) clean all;)
+endif
 
 %:
 	@$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) $@;)

Demos/Host/ClassDriver/makefile

@@ -23,7 +23,9 @@ ifeq ($(MAKELEVEL), 10)
 endif
 
 all:
+ifeq ($(OBJDIR),)
 	@$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) clean all;)
+endif
 
 %:
 	@$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) $@;)

Demos/Host/LowLevel/makefile

@@ -23,7 +23,9 @@ ifeq ($(MAKELEVEL), 10)
 endif
 
 all:
+ifeq ($(OBJDIR),)
 	@$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) clean all;)
+endif
 
 %:
 	@$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) $@;)