Introduce support for location views

[Nick Clifton]

Hi Alex,

> This patch introduces support for specifing views in .loc directives,

I just started testing this patch, but it fails to compile.  The error
is:

  gas/read.c: In function 'do_align':
  gas/read.c:781:3: error: implicit declaration of function 'dwarf2_emit_insn'

It looks like you are not including dwarf2dbg.h in read.c.  It also looks
like you are calling dwarf2_emit_insn() unconditionally, even for targets
which do not use/support the DWARF format...

Cheers
  Nick