Correct +JPcover line option #13522

Job	Run time
Build Erlang/OTP (64-bit)	15m 54s
Event File	2s
Build Erlang/OTP (iOS)	6m 5s
Build Erlang/OTP (Types and Flavors)	8m 35s
Build Erlang/OTP (macOS)	6m 57s
Build Erlang/OTP (Windows)	17m 23s
Build Erlang/OTP (32-bit)	8m 36s
Build and check documentation	8m 18s
Run static analysis	6m 44s
Test Erlang/OTP (emulator)	46m 0s
Build Erlang/OTP (cross-compile)	13m 40s
Test Erlang/OTP (debug)	4m 56s
Build Erlang/OTP (clang)	5m 40s
Release Erlang/OTP	0s
Test Erlang/OTP (system)	8m 25s
	2h 37m 15s

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