[clang] [analyzer] Fix crash in BasicValueFactory.cpp with __int128_t integers (PR #67212)

[via cfe-commits]

================
@@ -0,0 +1,10 @@
+// RUN: %clang_analyze_cc1 -analyzer-checker=optin.portability.UnixAPI \
+// RUN:    -triple x86_64-pc-linux-gnu -x c %s
+
+// Don't crash!
+// expected-no-diagnostics
+const __int128_t a = ( (__int128_t)1 << 64 );
----------------
vabridgers wrote:

I added a test case. Let me know if you're ok with this. Thanks!

https://github.com/llvm/llvm-project/pull/67212