K 10
svn:author
V 6
emaste
K 8
svn:date
V 27
2017-06-14T18:56:33.383524Z
K 7
svn:log
V 582
lld: Fix weak symbols on arm and aarch64

Given

.weak target
 .global _start
_start:
 b target

The intention is that the branch goes to the instruction after the
branch, effectively turning it on a nop.  The branch adds the runtime
PC, but we were adding it statically too.

I noticed the oddity by inspection, but llvm-objdump seems to agree,
since it now prints things like:

b       #-4 <_start+0x4>

Obtained from:  LLD commit r305212
Differential Revision:  https://reviews.freebsd.org/D11191

Reviewed by:	dim, Rafael Espíndola
Obtained from:	LLD r305212
MFC after:	3 days

END