[gn build] Port 3b1e18c

Author: llvmgnsyncbot

llvm/utils/gn/secondary/clang-tools-extra/clang-tidy/bugprone/BUILD.gn

@@ -24,6 +24,7 @@ static_library("bugprone") {
     "BoolPointerImplicitConversionCheck.cpp",
     "BranchCloneCheck.cpp",
     "BugproneTidyModule.cpp",
+    "CapturingThisInMemberVariableCheck.cpp",
     "CastingThroughVoidCheck.cpp",
     "ChainedComparisonCheck.cpp",
     "ComparePointerToMemberVirtualFunctionCheck.cpp",