LD64 emits string tables which start with a space and a zero byte.
This diff adjusts StringTableBuilder for linked Mach-O binaries to match LD64's behavior.
Test plan: make check-all
Differential revision: https://reviews.llvm.org/D89561
This diff fixes the calculation of the field vmsize
in LC_SEGMENT/LC_SEGMENT_64 load commands.
Test plan: make check-all
Differential revision: https://reviews.llvm.org/D78799