Solaris linker options need to be accounted for in one test.

This is a follow-up to f189d7a and 9d11b08.  While `-z ignore`
is what needs to be passed to the Solaris linker, because gcc is used as
the default linker, both that form and `-Wl,-z -Wl,ignore` (including
extra double quotes) need to be taken into account, which explains the
more complex regular expression.

Author: Danek Duvall

src/test/run-make/codegen-options-parsing/Makefile

@@ -25,7 +25,7 @@ all:
 
 	# Should not link dead code...
 	$(RUSTC) -Z print-link-args dummy.rs 2>&1 | \
-		grep -e '--gc-sections' -e '-dead_strip' -e '/OPT:REF'
+		grep -e '--gc-sections' -e '-z[^ ]* [^ ]*\<ignore\>' -e '-dead_strip' -e '/OPT:REF'
 	# ... unless you specifically ask to keep it
 	$(RUSTC) -Z print-link-args -C link-dead-code dummy.rs 2>&1 | \
-		(! grep -e '--gc-sections' -e '-dead_strip' -e '/OPT:REF')
+		(! grep -e '--gc-sections' -e '-z[^ ]* [^ ]*\<ignore\>' -e '-dead_strip' -e '/OPT:REF')