Finite Field support #442

Job	Run time
ubuntu-latest\|debug\|--enable-mcsat\|CC=gcc CXX=g++	8m 25s
ubuntu-latest\|debug\|--enable-mcsat\|CC=clang CXX=clang++	8m 52s
ubuntu-latest\|debug\|--enable-thread-safety\|CC=gcc CXX=g++	4m 3s
ubuntu-latest\|debug\|--enable-thread-safety\|CC=clang CXX=clang++	4m 22s
ubuntu-latest\|release\|--enable-mcsat\|CC=gcc CXX=g++	5m 13s
ubuntu-latest\|release\|--enable-mcsat\|CC=clang CXX=clang++	5m 33s
ubuntu-latest\|release\|--enable-thread-safety\|CC=gcc CXX=g++	2m 23s
ubuntu-latest\|release\|--enable-thread-safety\|CC=clang CXX=clang++	2m 31s
ubuntu-latest\|gcov\|--enable-mcsat\|CC=gcc CXX=g++	8m 0s
ubuntu-latest\|debug\|--enable-thread-safety --enable-mcsat\|CC=gcc CXX=g++	8m 33s
	57m 55s

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