be more aggressive about suppressing message boxes

.gitlab-ci.yml

@@ -52,7 +52,6 @@ Win10:
   stage: build
   allow_failure: true
   script:
-    - rm -fr build/*  #  remove anything in the build directory
     - env
     - sh %CI_PROJECT_DIR%/CI/before_script.msvc.sh -c Release -p x64 -v 2017 -V
     - msbuild MSVC2017_64\OpenMW.sln /t:Build /p:Configuration=Release /m:2
@@ -61,4 +60,5 @@ Win10:
     - deps
   artifacts:
     paths:
-    - "*/OpenMW*.exe"
+    - deps\boost_install.log
+    - "*\OpenMW*.exe"

CI/before_script.msvc.sh

@@ -421,8 +421,7 @@ fi
 			printf "Exists. "
 		elif [ -z $SKIP_EXTRACT ]; then
 			rm -rf Boost
-			# "${DEPS}/boost-1.61.0-msvc${MSVC_YEAR}-win${BITS}.exe" //dir="$(echo $BOOST_SDK | sed s,/,\\\\,g)" //verysilent
-			"${DEPS}/boost-1.61.0-msvc${MSVC_YEAR}-win${BITS}.exe" //dir="$(echo $BOOST_SDK | sed s,/,\\\\,g)"
+			"${DEPS}/boost-1.61.0-msvc${MSVC_YEAR}-win${BITS}.exe" //DIR="$(echo $BOOST_SDK | sed s,/,\\\\,g)" //VERYSILENT //NORESTART //SUPPRESSMSGBOXES //LOG="boost_install.log" 
 		fi
 
 		add_cmake_opts -DBOOST_ROOT="$BOOST_SDK" \