Add a variant of DWARFDie::find() and DWARFDie::findRecursively() that takes a llvm...

Add a variant of DWARFDie::find() and DWARFDie::findRecursively() that takes a llvm::ArrayRef<dwarf::Attribute>.

This allows us efficiently look for more than one attribute, something that is quite common in DWARF consumption.

Differential Revision: https://reviews.llvm.org/D28704

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@291967 91177308-0d34-0410-b5e6-96231b3b80d8