Merge pull request #9089 from gebart/pr/ldscript-attrs

cpu/cc2538/ldscripts/cc2538nf11.ld

cpu/cc2538/ldscripts/cc2538nf23.ld

cpu/cc2538/ldscripts/cc2538nf53.ld

cpu/cc2538/ldscripts/cc2538sf53.ld

cpu/cc26x0/ldscripts/cc26x0f128.ld

cpu/cortexm_common/ldscripts/cortexm.ld

cpu/cortexm_common/ldscripts/cortexm_base.ld

cpu/ezr32wg/ldscripts/ezr32wg330f256r60.ld

cpu/lm4f120/ldscripts/LM4F120H5QR.ld

cpu/lpc1768/ldscripts/lpc1768.ld

cpu/lpc2387/ldscripts/lpc2387.ld

cpu/mips_pic32mz/ldscripts/pic32mz2048_uhi.ld

cpu/nrf51/ldscripts/nrf51x22xxaa.ld

cpu/nrf51/ldscripts/nrf51x22xxab.ld

cpu/nrf51/ldscripts/nrf51x22xxac.ld

cpu/nrf52/ldscripts/nrf52832xxaa.ld

cpu/nrf52/ldscripts/nrf52832xxaa_sd.ld

cpu/nrf52/ldscripts/nrf52840xxaa.ld

cpu/nrf52/ldscripts/nrf52840xxaa_sd.ld

cpu/sam0_common/ldscripts/samd21j18a_arduino_bootloader.ld