[patch] Couple of minor tweaks to the linker testsuite

[Eric Botcazou]

Hi,

this gets rid of the couple of linker failures for visium-elf:

FAIL: ld-elf/pr14156b
FAIL: ld-elf/pr22677

by tweaking the respective testcase.  The first tweak is the same as the one 
Alan made to the sibling testcase ld-elf/pr14156a.d about one year ago and the 
second tweak adds the usual main/start/_start/__start symbols.

Tested for visium-elf and x86_64-suse-linux, OK for the mainline?


2018-09-12  Eric Botcazou  <ebotcazou@adacore.com>

ld/
	* testsuite/ld-elf/pr14156b.d: Adjust for extra symbols.
	* testsuite/ld-elf/pr22677.s: Define main/start/_start/__start.

-- 
Eric Botcazou
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