[libsymbolized] If we can't find an address in the list of shared libraries, try to reload it.

Add a regression test for the case where such behavior helps TSan:
  1. race is reported in the main module
  2. new shared library is loaded
  3. race is reported in the shared library



git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@179032 91177308-0d34-0410-b5e6-96231b3b80d8