update sophia submodule, fix memory leaks

src/box/request.cc

src/box/sophia_engine.cc

src/box/sophia_engine.h

src/box/sophia_index.cc

src/ffisyms.cc

test/sophia/box.lua

test/sophia/crud.result

test/sophia/crud.test.lua

test/sophia/dml.result

test/sophia/dml.test.lua

test/sophia/gh.result

test/sophia/gh.test.lua

test/sophia/index_random_test.lua

test/sophia/info.result

test/sophia/info.test.lua

test/sophia/options.result

test/sophia/random.result

test/sophia/random.test.lua

test/sophia/snapshot.test.lua

test/sophia/suite.ini