…he C11 standard.

This hasn't been a problem historically, because if we have code like:

    if(foo) {
        do { ... } while(0);
    }

Then it gets parsed as (not the real AST):

    if($Expr{ foo }, seqStmt(
        doWhile(...), -- do { ... } while(0)
	emptyStmt(), -- ;
    ))

However, this caused a parse failure when parsing the DPDK header, with code like:

    if(foo)
        do { ... } while(0);
    else
        f();

In this code, we have two statements after the if, so the else is
"floating."

This is implemented synonym for C11 _Thread_local.
https://stackoverflow.com/a/40635676 suggests that they're the same?
This probably ought to be verified before merging this, but this is a
hotfix.

…butes

… all the xmm intrinsic crud.

…lling in all the xmm intrinsic crud."

This reverts commit 3a17801.