Change API name to [s|g]et_label/1 #304

Job	Run time
Build Erlang/OTP (64-bit)	30m 56s
Event File	5s
Build Erlang/OTP (32-bit)	15m 33s
Build Erlang/OTP (Types and Flavors)	14m 14s
Build Erlang/OTP (macOS)	8m 15s
Build Erlang/OTP (cross-compile)	26m 24s
Build Erlang/OTP (iOS)	10m 45s
Build Erlang/OTP (clang)	13m 25s
Build Erlang/OTP (Windows)	19m 7s
Build and check documentation	13m 34s
Run static analysis	13m 22s
Test Erlang/OTP (emulator)	50m 28s
Test Erlang/OTP (debug)	9m 33s
Test Erlang/OTP (asn1)	23m 7s
Test Erlang/OTP (common_test)	1h 33m 30s
Test Erlang/OTP (compiler)	18m 38s
Test Erlang/OTP (crypto)	9m 32s
Test Erlang/OTP (debugger)	6m 56s
Test Erlang/OTP (dialyzer)	28m 15s
Test Erlang/OTP (edoc)	7m 15s
Test Erlang/OTP (eldap)	8m 15s
Test Erlang/OTP (erl_docgen)	5m 35s
Test Erlang/OTP (erl_interface)	9m 32s
Test Erlang/OTP (eunit)	6m 2s
Test Erlang/OTP (inets)	14m 4s
Test Erlang/OTP (kernel)	1h 9m 20s
Test Erlang/OTP (megaco)	36m 28s
Test Erlang/OTP (mnesia)	22m 29s
Test Erlang/OTP (observer)	17m 6s
Test Erlang/OTP (os_mon)	9m 47s
Test Erlang/OTP (public_key)	10m 41s
Test Erlang/OTP (reltool)	11m 40s
Test Erlang/OTP (runtime_tools)	7m 4s
Test Erlang/OTP (sasl)	14m 42s
Test Erlang/OTP (snmp)	51m 25s
Test Erlang/OTP (ssh)	50m 28s
Test Erlang/OTP (ssl)	55m 19s
Test Erlang/OTP (stdlib)	42m 22s
Test Erlang/OTP (tools)	13m 4s
Test Erlang/OTP (wx)	6m 25s
Test Erlang/OTP (xmerl)	11m 1s
Release Erlang/OTP	0s
Test Erlang/OTP (system)	24m 43s
	15h 10m 26s

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