[compiler-rt] [sanitizer] Fix running sanitizer_set_report_path_test on Android (PR #99469)

[Vitaly Buka via llvm-commits]

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@@ -14,13 +15,14 @@ int main(int argc, char **argv) {
   sprintf(buff, "%s.report_path/report", argv[0]);
   __sanitizer_set_report_path(buff);
   assert(strncmp(buff, __sanitizer_get_report_path(), strlen(buff)) == 0);
-  printf("Path %s\n", __sanitizer_get_report_path());
-  fflush(stdout);
+  sprintf(buff, "Path %s\n", __sanitizer_get_report_path());
+  write(STDERR_FILENO, buff, strlen(buff));
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vitalybuka wrote:

`fprintf(stderr, ....)` looks nicer to me, but we can avoid printing them at all

https://github.com/llvm/llvm-project/pull/99469