StringRef hasAnyOf/hasAllOf

Hi,
a downstream consumer of llvm I'm currently working provides the
following two functions:

static bool StringHasAllOf(const llvm::StringRef &s, const char *which);
static bool StringHasAnyOf(const llvm::StringRef &s,
std::initializer_list<const char *> which, size_t &where);

https://github.com/apple/swift-lldb/blob/stable/source/Target/SwiftLanguageRuntime.cpp#L691
https://github.com/apple/swift-lldb/blob/stable/source/Target/SwiftLanguageRuntime.cpp#L699

I'm under the impression these could be member functions of StringRef
(maybe with a different signature).

My only concern is that while I think these may be useful for the
general public, I haven't found any immediate use for them in llvm.
So I would like to hear what folks think before proposing the change/patch.

Thanks,

Joerg correctly pointed out on IRC we already have them in LLVM (thanks Joerg).
StringRef::find_{first,last}_{not_}of

I'll just convert the uses. Sorry for the noise!