make: Fix typo CFLAGS_DEBUG->CFLAGS_DBG

cpu/Makefile.include.cortexm_common

@@ -41,10 +41,10 @@ export CFLAGS_OPT  ?= -Os
 
 export CFLAGS += $(CFLAGS_CPU) $(CFLAGS_LINK) $(CFLAGS_DBG) $(CFLAGS_OPT)
 
-export ASFLAGS += $(CFLAGS_CPU) $(CFLAGS_DEBUG)
+export ASFLAGS += $(CFLAGS_CPU) $(CFLAGS_DBG)
 export LINKFLAGS += -L$(RIOTCPU)/$(CPU)/ldscripts -L$(RIOTCPU)/cortexm_common/ldscripts
 export LINKFLAGS += -T$(RIOTCPU)/$(CPU)/ldscripts/$(CPU_MODEL).ld -Wl,--fatal-warnings
-export LINKFLAGS += $(CFLAGS_DEBUG) $(CFLAGS_CPU) -static -lgcc -nostartfiles
+export LINKFLAGS += $(CFLAGS_DBG) $(CFLAGS_CPU) -static -lgcc -nostartfiles
 export LINKFLAGS += -Wl,--gc-sections
 
 # This CPU implementation is using the new core/CPU interface:

cpu/Makefile.include.msp430_common

@@ -9,7 +9,7 @@ CFLAGS_OPT  ?= -Os
 # export compiler flags
 export CFLAGS += $(CFLAGS_CPU) $(CFLAGS_LINK) $(CFLAGS_DBG) $(CFLAGS_OPT)
 # export assmebly flags
-export ASFLAGS += $(CFLAGS_CPU) --defsym $(CPU_MODEL)=1 $(CFLAGS_DEBUG)
+export ASFLAGS += $(CFLAGS_CPU) --defsym $(CPU_MODEL)=1 $(CFLAGS_DBG)
 # export linker flags
 export LINKFLAGS += $(CFLAGS_CPU) -lgcc