zld: allocate TextBlocks

temporarily by iterating over all defined TextBlocks. However,
once we merge this with MachO incremental, updates will be done
at the point of creation and/or update.

Also, fix mining TLV knowledge for working out TLV pointers.
7aeedc0912Jakub Konka committed on 7/15/2021, 4:49:47 PMparente524f43
4 files changedLine totals unavailable