Fix typo

llvm/lib/Target/WebAssembly/WebAssemblyExplicitLocals.cpp

for (MachineBasicBlock::iterator I = MF.begin()->begin(),
     checkFrameBase(MFI, Local, Reg);
     MI.eraseFromParent();
     Changed = true;
   }
 
   // Start assigning local numbers after the last parameter.
   unsigned CurLocal = static_cast<unsigned>(MFI.getParams().size());
 
-  // For swiftcc, additional swiftself and swifterror paramsters are added
+  // For swiftcc, additional swiftself and swifterror parameters are added
   // if there aren't. Forward the cursor for the extra parameters.
   if (MF.getFunction().getCallingConv() == CallingConv::Swift) {
     bool HasSwiftErrorArg = false;
     bool HasSwiftSelfArg = false;
     for (const auto &Arg : MF.getFunction().args()) {
       HasSwiftErrorArg |= Arg.hasAttribute(Attribute::SwiftError);
       HasSwiftSelfArg |= Arg.hasAttribute(Attribute::SwiftSelf);
     }