Uprev NSS (in libssl) to NSS 3.21

Update the bundled libssl to use NSS 3.21. This removes the
patches for DHE 1024-bit, lock ordering, and build metadata,
which are all upstreamed.

Upstream has added a dhe-param.c file, but this is intentionally
not added to build targets, as it's simply #included from another
C file.

BUG=568855

Review URL: https://codereview.chromium.org/1511123006

Cr-Original-Commit-Position: refs/heads/master@{#366244}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 95065347187475b6a60fdff82d87153dce14892f
48 files changed
tree: d8c7ef197b92f7f52514e3eed8060cdfbe8fceee
  1. patches/
  2. ssl/
  3. LICENSE
  4. OWNERS
  5. README.chromium
  6. ssl.gyp