[asan][test] Handle Solaris in large_func_test.cpp etc.

Two ASan tests currently `FAIL' on Solaris

  AddressSanitizer-i386-sunos :: TestCases/large_func_test.cpp
  AddressSanitizer-i386-sunos :: TestCases/use-after-delete.cpp

both for the same reason:

  error: no check strings found with prefix 'CHECK-SunOS:'

Fixed by adding the appropriate check strings.

Tested on `amd64-pc-solaris2.11` and `x86_64-pc-linux-gnu`.

Differential Revision: https://reviews.llvm.org/D97931