* rename -sil-print-only-function to -sil-print-function and -sil-print-only-functions to -sil-print-functions
* to print single functions, don't require -Xllvm -sil-print-all. It's now sufficient to use e.g. -Xllvm -sil-print-function=<f>
But it's still possible to select functions with -sil-print-function(s) for other print options, -sil-print-after.
And fix a test case that assumes Array.append is never inlined.
We need to be able to prevent inlining a function and any of its
specializations. There's no way to specify multiple function names on
the command line, so we use the partial match technique.
