[clangd] Add missing header guard, NFC.

git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@372860 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/clangd/FindTarget.h b/clangd/FindTarget.h
index e6db1fb..86f1e8b 100644
--- a/clangd/FindTarget.h
+++ b/clangd/FindTarget.h
@@ -19,6 +19,9 @@
 //
 //===----------------------------------------------------------------------===//
 
+#ifndef LLVM_CLANG_TOOLS_EXTRA_UNITTESTS_CLANGD_FINDTARGET_H
+#define LLVM_CLANG_TOOLS_EXTRA_UNITTESTS_CLANGD_FINDTARGET_H
+
 #include "clang/AST/ASTTypeTraits.h"
 #include "clang/AST/NestedNameSpecifier.h"
 #include "clang/AST/Stmt.h"
@@ -176,3 +179,5 @@
 
 } // namespace clangd
 } // namespace clang
+
+#endif // LLVM_CLANG_TOOLS_EXTRA_UNITTESTS_CLANGD_FINDTARGET_H
diff --git a/clangd/HeaderSourceSwitch.h b/clangd/HeaderSourceSwitch.h
index 902f87e..23ecc4b 100644
--- a/clangd/HeaderSourceSwitch.h
+++ b/clangd/HeaderSourceSwitch.h
@@ -6,6 +6,9 @@
 //
 //===----------------------------------------------------------------------===//
 
+#ifndef LLVM_CLANG_TOOLS_EXTRA_UNITTESTS_CLANGD_HEADERSOURCESWITCH_H
+#define LLVM_CLANG_TOOLS_EXTRA_UNITTESTS_CLANGD_HEADERSOURCESWITCH_H
+
 #include "ParsedAST.h"
 #include "llvm/ADT/Optional.h"
 
@@ -20,3 +23,5 @@
 
 } // namespace clangd
 } // namespace clang
+
+#endif // LLVM_CLANG_TOOLS_EXTRA_UNITTESTS_CLANGD_HEADERSOURCESWITCH_H