Fixes warning 'enumeration value not handled in switch'.

[bgraur]

Summary

This was introduced in commit: 981a0bd85811fe49379fdbef35528e2c2f3511a3.

[pifon2a]

Thank you!

llvm/tools/llvm-c-test/echo.cpp

switch (Kind) {
           Clone(LLVMGetElementType(Src)),
           LLVMGetVectorSize(Src)
         );
       case LLVMScalableVectorTypeKind:
         return LLVMScalableVectorType(Clone(LLVMGetElementType(Src)),
                                       LLVMGetVectorSize(Src));
       case LLVMMetadataTypeKind:
         return LLVMMetadataTypeInContext(Ctx);
+      case LLVMX86_AMXTypeKind:
+        return LLVMX86AMXTypeInContext(Ctx);
       case LLVMX86_MMXTypeKind:
         return LLVMX86MMXTypeInContext(Ctx);
       case LLVMTokenTypeKind:
         return LLVMTokenTypeInContext(Ctx);
     }
 
     fprintf(stderr, "%d is not a supported typekind\n", Kind);
     exit(-1);