fixes for amd64 compilation

scripts/objsizes

@@ -2,7 +2,7 @@
 
 printf "%9s %11s %9s %9s %s\n" "text+data" text+rodata rwdata bss filename
 find -name '*.o' | grep -v '^\./scripts/' | grep -vF built-in.o \
-| sed 's:^\./::' | xargs size | grep '^ *[0-9]' \
+| sed 's:^\./::' | xargs "${CROSS_COMPILE}size" | grep '^ *[0-9]' \
 | while read text data bss dec hex filename; do
     printf "%9d %11d %9d %9d %s\n" $((text+data)) $text $data $bss "$filename"
 done | sort -r