Add unit tests to the CI files

Added running unit tests to the Travis and AppVeyor yml files

Author: thk123

.travis.yml

@@ -152,6 +152,9 @@ script:
   - if [ -e bin/gcc ] ; then export PATH=$PWD/bin:$PATH ; fi ;
     COMMAND="env UBSAN_OPTIONS=print_stacktrace=1 make -C regression test" &&
     eval ${PRE_COMMAND} ${COMMAND}
+  - COMMAND="make -C unit CXX=\"$COMPILER\" CXXFLAGS=\"$FLAGS $EXTRA_CXXFLAGS\" -j2" &&
+    eval ${PRE_COMMAND} ${COMMAND}
+  - COMMAND="make -C unit test" && eval ${PRE_COMMAND} ${COMMAND}
 
 before_cache:
   - ccache -s

appveyor.yml

@@ -108,3 +108,7 @@ test_script:
     rmdir /s /q goto-instrument\slice08
 
     make test
+
+    cd ..
+    make -C unit all
+    make -C unit test