Add -g3 back to CMAKE_ASM_FLAGS_DEBUG (#305)

* Add -g3 back to ASM flags

* Use common flags

Author: aleun

cmake/arm-gcc-cortex-toolchain.cmake

@@ -51,7 +51,7 @@ set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
 set(CMAKE_COMMON_FLAGS "-g3 --specs=nano.specs -ffunction-sections -fdata-sections -fno-strict-aliasing -fno-builtin -fshort-enums -Wall -Wextra -Wuninitialized -Wmaybe-uninitialized -Wshadow -Wdouble-promotion -Werror -Wno-unused-parameter")
 set(CMAKE_C_FLAGS 	"${MCPU_FLAGS} ${VFP_FLAGS} ${CMAKE_COMMON_FLAGS}")
 set(CMAKE_CXX_FLAGS "${MCPU_FLAGS} ${VFP_FLAGS} ${CMAKE_COMMON_FLAGS}")
-set(CMAKE_ASM_FLAGS "${MCPU_FLAGS} ${VFP_FLAGS}")
+set(CMAKE_ASM_FLAGS "${MCPU_FLAGS} ${VFP_FLAGS} ${CMAKE_COMMON_FLAGS}")
 set(CMAKE_EXE_LINKER_FLAGS "${LD_FLAGS} -fno-common -Wl,--gc-sections,-print-memory-usage")
 
 set(CMAKE_C_FLAGS_DEBUG "-O0")