Upgrade to wt 3.3.6, fixing the wt tests (#2639)

The sourceforge.net link for wt 3.3.3 is broken, causing the wt tests to
fail.

Adding the "-lboost_system" flag in the setup files seemed to be
necessary.  Without it, the wt framework would install, but the tests
would fail.  I found out about that flag by googling for the error
message; I don't actually know what the flag does.

I removed the trailing "&" from the final line of the setup files as
I've been doing with other frameworks, since it has become unnecessary
(and even harmful sometimes) due to other changes in our toolset.

frameworks/C++/wt/setup.sh

@@ -4,6 +4,6 @@ fw_depends mysql apache wt
 
 sed -i 's|INSERT_DB_HOST_HERE|'"${DBHOST}"'|g' benchmark.cpp
 
-g++-4.8 -O3 -DNDEBUG -std=c++0x -L${BOOST_LIB} -I${BOOST_INC} -L${WT_LIB} -I${WT_INC} -o benchmark.wt benchmark.cpp -lwt -lwthttp -lwtdbo -lwtdbomysql -lboost_thread
+g++-4.8 -O3 -DNDEBUG -std=c++0x -L${BOOST_LIB} -I${BOOST_INC} -L${WT_LIB} -I${WT_INC} -o benchmark.wt benchmark.cpp -lwt -lwthttp -lwtdbo -lwtdbomysql -lboost_thread -lboost_system
 
-./benchmark.wt -c wt_config.xml -t ${MAX_THREADS} --docroot . --http-address 0.0.0.0 --http-port 8080 --accesslog=- --no-compression &
+./benchmark.wt -c wt_config.xml -t ${MAX_THREADS} --docroot . --http-address 0.0.0.0 --http-port 8080 --accesslog=- --no-compression

frameworks/C++/wt/setup_postgres.sh

@@ -4,6 +4,6 @@ fw_depends postgresql apache wt
 
 sed -i 's|INSERT_DB_HOST_HERE|'"${DBHOST}"'|g' benchmark.cpp
 
-g++-4.8 -O3 -DNDEBUG -DBENCHMARK_USE_POSTGRES -std=c++0x -L${BOOST_LIB} -I${BOOST_INC} -L${WT_LIB} -I${WT_INC} -o benchmark_postgres.wt benchmark.cpp -lwt -lwthttp -lwtdbo -lwtdbopostgres -lboost_thread
+g++-4.8 -O3 -DNDEBUG -DBENCHMARK_USE_POSTGRES -std=c++0x -L${BOOST_LIB} -I${BOOST_INC} -L${WT_LIB} -I${WT_INC} -o benchmark_postgres.wt benchmark.cpp -lwt -lwthttp -lwtdbo -lwtdbopostgres -lboost_thread -lboost_system
 
-./benchmark_postgres.wt -c wt_config.xml -t ${MAX_THREADS} --docroot . --http-address 0.0.0.0 --http-port 8080 --accesslog=- --no-compression &
+./benchmark_postgres.wt -c wt_config.xml -t ${MAX_THREADS} --docroot . --http-address 0.0.0.0 --http-port 8080 --accesslog=- --no-compression

toolset/setup/linux/frameworks/wt.sh

@@ -34,10 +34,11 @@ elif [ "$TFB_DISTRIB_CODENAME" == "precise" ]; then
     sudo apt-get -y install libboost1.48-all-dev
 fi
 
-fw_get -O http://downloads.sourceforge.net/witty/wt-3.3.3.tar.gz
-fw_untar wt-3.3.3.tar.gz
+fw_get -O https://github.com/emweb/wt/archive/3.3.6.tar.gz
+mv 3.3.6.tar.gz wt-3.3.6.tar.gz
+fw_untar wt-3.3.6.tar.gz
 
-cd wt-3.3.3
+cd wt-3.3.6
 mkdir -p build
 cd build
 cmake .. -DWT_CPP_11_MODE=-std=c++0x -DCMAKE_BUILD_TYPE=Release \