Update ci -- run mcsat with thread-safety #235

Job	Run time
ubuntu-latest\|debug\|--enable-mcsat\|CC=gcc CXX=g++	10m 3s
ubuntu-latest\|debug\|--enable-mcsat\|CC=clang CXX=clang++	9m 0s
ubuntu-latest\|debug\|--enable-thread-safety\|CC=gcc CXX=g++	5m 44s
ubuntu-latest\|debug\|--enable-thread-safety\|CC=clang CXX=clang++	5m 21s
ubuntu-latest\|release\|--enable-mcsat\|CC=gcc CXX=g++	5m 48s
ubuntu-latest\|release\|--enable-mcsat\|CC=clang CXX=clang++	6m 26s
ubuntu-latest\|release\|--enable-thread-safety\|CC=gcc CXX=g++	3m 17s
ubuntu-latest\|release\|--enable-thread-safety\|CC=clang CXX=clang++	2m 42s
ubuntu-latest\|gcov\|--enable-mcsat\|CC=gcc CXX=g++	9m 54s
ubuntu-latest\|debug\|--enable-thread-safety --enable-mcsat\|CC=gcc CXX=g++	9m 50s
	1h 8m 5s

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