[llvm-symbolizer]Fix printing of malformed address values not passed via stdin

Summary:
relates https://bugs.llvm.org/show_bug.cgi?id=44443

Adding missing newline when printing bad input values.

Fix testcase

Reviewers: jhenderson

Reviewed By: jhenderson

Subscribers: rupprecht, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D72313