Update ci -- run mcsat with thread-safety (#468) #236

Job	Run time
ubuntu-latest\|debug\|--enable-mcsat\|CC=gcc CXX=g++	9m 59s
ubuntu-latest\|debug\|--enable-mcsat\|CC=clang CXX=clang++	9m 42s
ubuntu-latest\|debug\|--enable-thread-safety\|CC=gcc CXX=g++	5m 33s
ubuntu-latest\|debug\|--enable-thread-safety\|CC=clang CXX=clang++	4m 30s
ubuntu-latest\|release\|--enable-mcsat\|CC=gcc CXX=g++	5m 58s
ubuntu-latest\|release\|--enable-mcsat\|CC=clang CXX=clang++	7m 8s
ubuntu-latest\|release\|--enable-thread-safety\|CC=gcc CXX=g++	3m 2s
ubuntu-latest\|release\|--enable-thread-safety\|CC=clang CXX=clang++	3m 27s
ubuntu-latest\|gcov\|--enable-mcsat\|CC=gcc CXX=g++	9m 7s
ubuntu-latest\|debug\|--enable-thread-safety --enable-mcsat\|CC=gcc CXX=g++	11m 44s
	1h 10m 10s

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