mcsat Random decision frequency and seed cmdline options #480

Job	Run time
ubuntu-latest\|debug\|--enable-mcsat\|CC=gcc CXX=g++	8m 38s
ubuntu-latest\|debug\|--enable-mcsat\|CC=clang CXX=clang++	9m 22s
ubuntu-latest\|debug\|--enable-thread-safety\|CC=gcc CXX=g++	3m 58s
ubuntu-latest\|debug\|--enable-thread-safety\|CC=clang CXX=clang++	4m 11s
ubuntu-latest\|release\|--enable-mcsat\|CC=gcc CXX=g++	5m 15s
ubuntu-latest\|release\|--enable-mcsat\|CC=clang CXX=clang++	5m 17s
ubuntu-latest\|release\|--enable-thread-safety\|CC=gcc CXX=g++	2m 18s
ubuntu-latest\|release\|--enable-thread-safety\|CC=clang CXX=clang++	2m 42s
ubuntu-latest\|gcov\|--enable-mcsat\|CC=gcc CXX=g++	8m 19s
ubuntu-latest\|debug\|--enable-thread-safety --enable-mcsat\|CC=gcc CXX=g++	8m 12s
	58m 12s

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