[gn build] Port 25b9696

Author: llvmgnsyncbot

llvm/utils/gn/secondary/clang/lib/StaticAnalyzer/Checkers/BUILD.gn

@@ -19,6 +19,7 @@ static_library("Checkers") {
     "ArrayBoundChecker.cpp",
     "ArrayBoundCheckerV2.cpp",
     "BasicObjCFoundationChecks.cpp",
+    "BitwiseShiftChecker.cpp",
     "BlockInCriticalSectionChecker.cpp",
     "BoolAssignmentChecker.cpp",
     "BuiltinFunctionChecker.cpp",