Changes

[llvm-readobj/llvm-readelf] - Simplify the code that dumps versions.
After changes introduced in D70495 and D70826 its now possible to
significantly simplify the code we have.
This also fixes an issue: previous code assumed that version strings 
should always be read from the dynamic string table. While it is 
normally true, the string table should be taken from the corresponding 
sh_link field.
Differential revision: https://reviews.llvm.org/D70855

[X86] Add initialization of FPCW in llvm-exegesis
Summary: This is a following up to D70874. It adds the initialization of
FPCW in llvm-exegesis.
Reviewers: craig.topper, RKSimon, courbet, gchatelet
Subscribers: tschuett, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D70891

[lldb][NFC] Use raw_ostream instead of Stream in Baton::GetDescription
Removing raw_ostream here is getting us closer to removing LLDB's Stream 
class.