Fix typo in two files in Clang

[xgupta]

Thanks, LGTM!

clang/lib/AST/Interp/Context.h

public:
 
   /// Classifies an expression.
   llvm::Optional<PrimType> classify(QualType T);
 
 private:
   /// Runs a function.
   bool Run(State &Parent, Function *Func, APValue &Result);
 
-  /// Checks a result fromt the interpreter.
+  /// Checks a result from the interpreter.
   bool Check(State &Parent, llvm::Expected<bool> &&R);
 
 private:
   /// Current compilation context.
   ASTContext &Ctx;
   /// Interpreter stack, shared across invocations.
   InterpStack Stk;
   /// Constexpr program.
   std::unique_ptr<Program> P;
 };
 
 } // namespace interp
 } // namespace clang
 
 #endif

clang/lib/AST/Interp/Interp.h

 #include <vector>
 
 namespace clang {
 namespace interp {
 
 using APInt = llvm::APInt;
 using APSInt = llvm::APSInt;
 
-/// Convers a value to an APValue.
+/// Convert a value to an APValue.
 template <typename T> bool ReturnValue(const T &V, APValue &R) {
   R = V.toAPValue();
   return true;
 }
 
 /// Checks if the variable has externally defined storage.
 bool CheckExtern(InterpState &S, CodePtr OpPC, const Pointer &Ptr);
 
 /// Checks if the array is offsetable.
 bool CheckArray(InterpState &S, CodePtr OpPC, const Pointer &Ptr);
 
-/// Checks if a pointer is live and accesible.
+/// Checks if a pointer is live and accessible.
 bool CheckLive(InterpState &S, CodePtr OpPC, const Pointer &Ptr,
                AccessKinds AK);
 /// Checks if a pointer is null.
 bool CheckNull(InterpState &S, CodePtr OpPC, const Pointer &Ptr,
                CheckSubobjectKind CSK);
 
 /// Checks if a pointer is in range.
 bool CheckRange(InterpState &S, CodePtr OpPC, const Pointer &Ptr,