otp: adds licenses to files that require it #18221

Job	Run time
Build Erlang/OTP (64-bit)	8m 54s
Event File	4s
Build Erlang/OTP (iOS)	3m 54s
Build Erlang/OTP (macOS)	3m 21s
Build Erlang/OTP (Windows)	10m 10s
Build Erlang/OTP (Types and Flavors)	7m 51s
Build and check documentation	4m 57s
Run static analysis	6m 11s
Build Erlang/OTP (32-bit)	9m 46s
Test Erlang/OTP (emulator)	48m 4s
Test Erlang/OTP (debug)	4m 31s
Build Erlang/OTP (cross-compile)	14m 39s
Test Erlang/OTP (asn1)	15m 12s
Test Erlang/OTP (compiler)	10m 9s
Build Erlang/OTP (clang)	5m 27s
Test Erlang/OTP (stdlib)	1h 6m 58s
Release Erlang/OTP	0s
Test Erlang/OTP (system)	8m 9s
	3h 48m 17s

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