Roll src/third_party/lss/ f70e2f164..29f7c7e01 (6 commits)

https://chromium.googlesource.com/linux-syscall-support.git/+log/f70e2f1641e2..29f7c7e018f4

$ git log f70e2f164..29f7c7e01 --date=short --no-merges --format='%ad %ae %s'
2020-08-12 palmer Add support for `getrandom`.
2020-05-21 palmer Revert "Add support for `getrandom`."
2020-05-20 palmer Add support for `getrandom`.
2020-04-15 jperaza Don't clobber esp
2020-03-10 mforney Avoid conflict with getdents64 defined by libc
2019-01-26 vapier futex: change to 6 args

Created with:
  roll-dep src/third_party/lss

Bug: linux-syscall-support:31, chromium:995996
Change-Id: I347f10acab9e1c0d9e6570c79afb09f8ac292c0f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2354678Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Chris Palmer <palmer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#797861}

DEPS

@@ -238,7 +238,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling lss
   # and whatever else without interference from each other.
-  'lss_revision': 'f70e2f1641e280e777edfdad7f73a2cfa38139c7',
+  'lss_revision': '29f7c7e018f4ce706a709f0b0afbf8bacf869480',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling NaCl
   # and whatever else without interference from each other.