Update before_script.msvc.sh

updating version check and correct indentation, wrap BOOST_SDK in "" to support dirs with spaces.

CI/before_script.msvc.sh

@@ -419,12 +419,12 @@ fi
 		BOOST_SDK="$(real_pwd)/Boost"
 		CWD_DRIVE_ROOT=`powershell -command '(get-location).Drive.Root'`  # get the current working drive's root
 
-		if [ -d Boost ] && grep "BOOST_VERSION 106100" Boost/boost/version.hpp > /dev/null; then
+		if [ -d Boost ] && grep "BOOST_VERSION 106700" Boost/boost/version.hpp > /dev/null; then
 			printf "Exists. "
 		elif [ -z $SKIP_EXTRACT ]; then
 			rm -rf Boost
 			"${DEPS}/boost-1.67.0-msvc${MSVC_YEAR}-win${BITS}.exe" //DIR="${CWD_DRIVE_ROOT}Boost_temp" //VERYSILENT //NORESTART //SUPPRESSMSGBOXES //LOG="boost_install.log"			
-			mv "${CWD_DRIVE_ROOT}Boost_temp" ${BOOST_SDK}
+			mv "${CWD_DRIVE_ROOT}Boost_temp" "${BOOST_SDK}"
 
 		fi