stand: Move sections around to fix stand/ build with ld.lld on armv7

When building loader bits, lld fails with the following error:
"ld: error: section: .dynamic is not contiguous with other relro sections"
on both ubldr and EFI loader.

Move .dynamic up to make ld.lld happy, adjust .got as necessary for ubldr.

Tested on: OrangePi One (ld.lld, ubldr)
Tested on: Banana Pi-M3 (ld.lld, ubldr)
Tested on: qemu-armv7 (ld.lld, EFI)
Tested on: qemu-armv7 (ld.bfd, EFI)
Tested on: Raspberry Pi 2 (ld.bfd, ubldr) [manu]
Tested on: Banana Pi-M2 (ld.bfd, ubldr) [manu]
Reviewed by: andrew, emaste, imp
Differential Revision: https://reviews.freebsd.org/D13942