os: fix exec() and get_raw_line(); fix Windows tests and examples

.travis.yml

@@ -38,10 +38,15 @@ script:
     fi    
   - |
     if [[ "${TRAVIS_OS_NAME}" == "windows" ]]; then
+      git clone --depth=1 https://github.com/ubawurinna/freetype-windows-binaries  thirdparty/freetype/
+      ##echo "Just running ./make.bat to produce v.exe"
+      ##./make.bat
+      ##echo "Running only the repl tests directly"
+      ##./v.exe ./compiler/tests/repl/repl_test.v
       echo "Testing msvc bootstrapping"
-      #./make_msvc.bat
+      ./make_msvc.bat
       echo "Running make_tests.bat..."
-      #./make_tests.bat
+      ./make_tests.bat
     fi
   - |
     if [[ "${TRAVIS_OS_NAME}" != "windows" ]]; then