Collect evidence for function parameters from observed call sites.

Records Nonnull, Nullable, and Unknown arguments for use in flexible heuristics.

PiperOrigin-RevId: 549105355
Change-Id: Iea59d3ff84987446357d84cdba11df6d6ba8478f
diff --git a/nullability/BUILD b/nullability/BUILD
index 2d4e9c4..7abc7b6 100644
--- a/nullability/BUILD
+++ b/nullability/BUILD
@@ -110,6 +110,7 @@
         ":pointer_nullability",
         "@llvm-project//clang:analysis",
         "@llvm-project//clang:ast",
+        "@llvm-project//clang:basic",
         "@llvm-project//third-party/unittest:gtest",
         "@llvm-project//third-party/unittest:gtest_main",
     ],