gnu17 is now the platform default. am: d41e3b282d am: c0ecb97421 am: 43b5a8206d am: 7860cc2cea am: 7559a79886 am: d74fd81f45

Original change: https://android-review.googlesource.com/c/platform/external/libwebsockets/+/2626762

Change-Id: I56b63e60083dce9ddbaa9108e467bec65d19e746
Signed-off-by: Automerger Merge Worker <[email protected]>