Finite Field support #443

Job	Run time
ubuntu-latest\|debug\|--enable-mcsat\|CC=gcc CXX=g++	2m 56s
ubuntu-latest\|debug\|--enable-mcsat\|CC=clang CXX=clang++	2m 58s
ubuntu-latest\|debug\|--enable-thread-safety\|CC=gcc CXX=g++	2m 55s
ubuntu-latest\|debug\|--enable-thread-safety\|CC=clang CXX=clang++	2m 54s
ubuntu-latest\|release\|--enable-mcsat\|CC=gcc CXX=g++	2m 54s
ubuntu-latest\|release\|--enable-mcsat\|CC=clang CXX=clang++	2m 37s
ubuntu-latest\|release\|--enable-thread-safety\|CC=gcc CXX=g++	2m 29s
ubuntu-latest\|release\|--enable-thread-safety\|CC=clang CXX=clang++	2m 36s
ubuntu-latest\|gcov\|--enable-mcsat\|CC=gcc CXX=g++	2m 41s
ubuntu-latest\|debug\|--enable-thread-safety --enable-mcsat\|CC=gcc CXX=g++	2m 38s
	27m 38s

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