build: fix flags for ngtcp2 on IBM i

[sravani1510]

similar to aix IBM i does not support certain network flags we are getting the following build errors:

../deps/ngtcp2/ngtcp2/examples/shared.cc:68:63: error:
 'IPTOS_ECN_MASK' was not declared in this scope
   68 |         return *reinterpret_cast<uint8_t *>(CMSG_DATA(cmsg))
    & IPTOS_ECN_MASK;
      |                                                              
       ^~~~~~~~~~~~~~
../deps/ngtcp2/ngtcp2/examples/shared.cc:80:22: error:
 'IPTOS_ECN_MASK' was not declared in this scope
   80 |         return tos & IPTOS_ECN_MASK;
      |                      ^~~~~~~~~~~~~~

[nodejs-github-bot]

Review requested:

• @nodejs/gyp
• @nodejs/security-wg

[sravani1510]

CC

@nodejs/platform-ibmi

[richardlau]

@sravani1510 Would you be able to change the commit message to "build: fix flags for ngtcp2 on IBM i"? (Or something similar, the important bit is that we don't use the "fix:" prefix here -- see our commit message guidelines.)

[abmusse]

Test Build: https://ci.nodejs.org/job/node-test-commit-ibmi/nodes=ibmi74-ppc64/2095/console

We will also need to skip the tests like on AIX.

See: #60064

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/69475/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/69479/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/69483/

[abmusse]

LGTM

[nodejs-github-bot]

Landed in 0eda17b

[targos]

depends on #59946