[compiler-rt] Follow up fix for the refactoring in https://reviews.llvm.org/D74137.

Summary:
The refactoring has caused a failure in
http://lab.llvm.org:8011/builders/clang-ppc64le-linux/builds/29265

The idea of failing the symbolization when the symbolizer bufer is too small
was incorrect. The symbolizer can be invoked for other frames that may fit into
the buffer and get symbolized.

Reviewers: vitalybuka, eugenis

Subscribers: dberris, #sanitizers, llvm-commits

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D74343