[lldb] Early exit in RangeDataVector:FindEntryIndexesThatContain

Summary:
We currently spend a lot of time in this function (around 27% of the br-by-regex benchmark in lldb-bench)
by just iterating over all the ranges. We already sorted these ranges by their base address, we we can actually
just stop checking ranges as soon as we find one that has a higher base address.

Reviewers: labath

Reviewed By: labath

Subscribers: amccarth, arphaman, JDevlieghere, lldb-commits

Tags: #lldb

Differential Revision: https://reviews.llvm.org/D67123

llvm-svn: 370879