GitLab

Previously Supersize archive for binaries linked with LLD (no LTO) did
not support string literals, and required '--no-string-literals' to
avoid triggering assert. This CL fixes this this by adding preliminary
support for merged strings. Wrinkles:
- LLD .map files does not discern string literals from data literals
  (and testing align=1 seems insufficient), so we count everything as
  string literals for now.
- llvm-readobj (AKA llvm-readelf)'s dump for .a files is missing
  'File: libray.a(file.o)' output. For now we work around this by
  using regular readelf instead.

Bug: 723798
Change-Id: Ic0c9a48dfd9ab157ed19471127a5216ee98b8d65
Reviewed-on: https://chromium-review.googlesource.com/777441
Commit-Queue: Samuel Huang <huangs@chromium.org>
Reviewed-by: agrieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/master@{#517752}