the size of .a and .bin files in AC6 is differnt from AC5

dear ARM,

We recently update AC5 to AC6. When using AC6, the size of output file (.a and .bin) are very diffent from AC5. Our compile option is: 

--target=arm-arm-none-eabi -mcpu=cortex-r5 -O1 -fshort-wchar -mno-unaligned-access -mlittle-endian -g -mthumb

size differences are shown in below:

Please help us, thanks~