scripts: support separating .bss section. [1/1]

PD#SWPL-141925

Problem:
xtensa need separate .bss section.

Solution:
add separate .bss section function.

Verify:
N/A

Change-Id: I5673522f3a2939ba4eea0f61b262a00ab672c975
Signed-off-by: shijie.xiong <shijie.xiong@amlogic.com>
1 file changed