binutils: backport gas xtensa jump trampolines

This fixes compilation of huge source files that have jumps with offsets
greater than 128 Kbytes, that otherwise fails with such messages:

  {standard input}:65267: Error: operand 1 of 'j' has out of range value '131089'
  {standard input}:106879: Error: operand 1 of 'j' has out of range value '4294833951'

Fixes:
  http://autobuild.buildroot.net/results/e45/e450d5efc7435035c956bb962d598837648f319d/



Backported from: a82c7d9030b67a6a76a5403d0e1641f9e42141ac
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>