CI: Fix Makefiles for parallel builds #2739

Job	Run time
Analyze (cpp, ubuntu-latest, CC=gcc CXX=g++, no, no)	5m 48s
Analyze (cpp, ubuntu-latest, CC=gcc CXX=g++, no, libusb-1.0)	5m 40s
Analyze (cpp, ubuntu-latest, CC=gcc CXX=g++, no, libusb-0.1)	5m 57s
Analyze (cpp, ubuntu-latest, CC=gcc CXX=g++, nss, no)	5m 22s
Analyze (cpp, ubuntu-latest, CC=gcc CXX=g++, nss, libusb-1.0)	4m 59s
Analyze (cpp, ubuntu-latest, CC=gcc CXX=g++, nss, libusb-0.1)	6m 40s
Analyze (cpp, ubuntu-latest, CC=gcc CXX=g++, openssl, no)	4m 31s
Analyze (cpp, ubuntu-latest, CC=gcc CXX=g++, openssl, libusb-1.0)	4m 43s
Analyze (cpp, ubuntu-latest, CC=gcc CXX=g++, openssl, libusb-0.1)	6m 16s
Analyze (cpp, ubuntu-latest, CC=clang CXX=clang++, no, no)	4m 50s
Analyze (cpp, ubuntu-latest, CC=clang CXX=clang++, no, libusb-1.0)	5m 33s
Analyze (cpp, ubuntu-latest, CC=clang CXX=clang++, no, libusb-0.1)	4m 59s
Analyze (cpp, ubuntu-latest, CC=clang CXX=clang++, nss, no)	4m 59s
Analyze (cpp, ubuntu-latest, CC=clang CXX=clang++, nss, libusb-1.0)	5m 11s
Analyze (cpp, ubuntu-latest, CC=clang CXX=clang++, nss, libusb-0.1)	5m 19s
Analyze (cpp, ubuntu-latest, CC=clang CXX=clang++, openssl, no)	4m 53s
Analyze (cpp, ubuntu-latest, CC=clang CXX=clang++, openssl, libusb-1.0)	9m 52s
Analyze (cpp, ubuntu-latest, CC=clang CXX=clang++, openssl, libusb-0.1)	5m 42s
Analyze (python, ubuntu-latest, PYTHON=python3, no, no)	1m 8s
	1h 42m 22s

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