[PATCH 6/6] Fix dw2-ifort-parameter.exp fail with clang

[Doug Evans]

Yao Qi writes:
 > The patch <https://sourceware.org/ml/gdb-patches/2014-03/msg00202.html>
 > fixed dw2-ifort-parameter.exp on powerpc64 by adding some labels to
 > get the start and end address of function func.  This should also fix the
 > fail on thumb mode, however, this style is quite specific to gcc, and
 > other compiler, such as clang, may not guarantee the order of global
 > asms and functions.  The test fails with clang:
 > 
 > $ make check RUNTESTFLAGS='dw2-ifort-parameter.exp CC_FOR_TARGET=clang'
 > (gdb) p/x param^M
 > No symbol "param" in current context.^M
 > (gdb) FAIL: gdb.dwarf2/dw2-ifort-parameter.exp: p/x param
 > 
 > With this patch applied, dw2-ifort-parameter.exp still passes for gcc
 > on arm thumb mode and popwerpc64, and it also passes for clang on
 > x86_linux.
 > 
 > gdb/testsuite:
 > 
 > 2014-10-24  Yao Qi  <yao@codesourcery.com>
 > 
 > 	* gdb.dwarf2/dw2-ifort-parameter.c: Remove inline asm.
 > 	(func): Add label func_label.
 > 	* gdb.dwarf2/dw2-ifort-parameter.exp (Dwarf::assemble):
 > 	Replace low_pc and high_pc with MACRO_AT_range.
 > 	Replace name, low_pc and high_pc with MACRO_AT_func.

LGTM