Squashed commit of the following:
configs/: Add . = ALIGN(4); before every .data section
configs/: Add . = ALIGN(4); before every ARM.extab section
configs/: Add . = ALIGN(4); before every definition of __exidx_start
configs/: Add . = ALIGN(4); before every .init_section.
configs/: Convert TABs to spaces in all ld linker scripts. This just makes things easier to modify with scripts because the files are more consistent.