[dsymutil] Fix __LINKEDIT vmsize in dsymutil upgrade path
[dsymutil] Fix __LINKEDIT vmsize in dsymutil upgrade path

Summary:
dsymutil upgrade path can change the size of segment and it needs to update
the vmsize of the segment to reflect the size change.

rdar://problem/30290714

Reviewers: friss

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D29433

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@293842 91177308-0d34-0410-b5e6-96231b3b80d8

apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm