[ELF] - Simplify and improve symbols.s testcase.
[ELF] - Simplify and improve symbols.s testcase.

There is no need to check anything excepr that
symbol is not in output.
Previously additional iformation like symbol values
or flags were checked, that was not correct.
For example if we would provide symbol with different
value/visibility/type for case when should not provide 
symbol at all, testcase would not fail.

git-svn-id: f6089bf0e6284f307027cef4f64114ee9ebb0424@312779 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/lld,llvm-mirror/lld