[asan] Test that asan does not report use-after-scope if program jumped over variable declaration.

[vitalybuka]

Summary

Test to check if PR28267 workaround works.

PR28267
PR27453

compiler-rt/trunk/test/asan/TestCases/use-after-scope-goto.c

+// RUN: %clang_asan -O0 -fsanitize-address-use-after-scope %s -o %t && %run %t
+
+// Function jumps over variable initialization making lifetime analysis
+// ambiguous. Asan should ignore such variable and program must not fail.
+
+int *ptr;
+
+void f(int cond) {
+  if (cond)
+    goto label;
+  int tmp = 1;
+
+label:
+  ptr = &tmp;
+  *ptr = 5;
+}
+
+int main() {
+  f(1);
+  return 0;
+}