[gn build] Port 176bf50

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Differential Revision: https://phabricator.intern.facebook.com/D60251714

Author: llvmgnsyncbot

llvm/utils/gn/secondary/clang/lib/Sema/BUILD.gn

@@ -60,6 +60,7 @@ static_library("Sema") {
     "SemaAvailability.cpp",
     "SemaBPF.cpp",
     "SemaBase.cpp",
+    "SemaBoundsSafety.cpp",
     "SemaCUDA.cpp",
     "SemaCXXScopeSpec.cpp",
     "SemaCast.cpp",