Fix header guards in native_client_sdk/ [1/2]

Consider native_client_sdk/src as root.
Generated mechanically as follows:

git ls-files '*.h' | grep -E '^native_client_sdk/' |\
grep -v third_party |\
parallel --xargs cpplint.py --filter=-,+build/header_guard -- 2>&1 |\
grep build/header | head -151 |\
tools/apply_cpplint_header_guard.py native_client_sdk/src/

Bug: 1200694
Change-Id: Ifc1e1a3c79745e71ef7f092a6cd77eb538e0b0ea
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3023704
Commit-Queue: Henrique Ferreiro <hferreiro@igalia.com>
Reviewed-by: Henrique Ferreiro <hferreiro@igalia.com>
Reviewed-by: Sam Clegg <sbc@chromium.org>
Cr-Commit-Position: refs/heads/master@{#904682}