msi: quote path which contains space

Path must be quoted correctly when it contains space.

e.g. c:\Dummy Program Files (FOO)\fluent...

Signed-off-by: Kentaro Hayashi <hayashi@clear-code.com>

fluent-package/msi/assets/fluentd.bat

@@ -1,8 +1,8 @@
 @echo off
 if "%~nx0" == "td-agent.bat" (
-  set FLUENT_PACKAGE_TOPDIR=%~dp0..\
+  set "FLUENT_PACKAGE_TOPDIR=%~dp0..\"
 ) else (
-  set FLUENT_PACKAGE_TOPDIR=%~dp0
+  set "FLUENT_PACKAGE_TOPDIR=%~dp0"
 )
 
 @rem Convert path separator from backslash to forwardslash
@@ -11,12 +11,12 @@ set FLUENT_PACKAGE_TOPDIR=!FLUENT_PACKAGE_TOPDIR:\=/!
 
 set PATH=%FLUENT_PACKAGE_TOPDIR%bin;%PATH%
 set PATH=%FLUENT_PACKAGE_TOPDIR%;%PATH%
-set FLUENT_CONF=%FLUENT_PACKAGE_TOPDIR%/etc/fluent/fluentd.conf
-set FLUENT_PLUGIN=%FLUENT_PACKAGE_TOPDIR%/etc/fluent/plugin
-set FLUENT_PACKAGE_VERSION=%FLUENT_PACKAGE_TOPDIR%/bin/fluent-package-version.rb
+set FLUENT_CONF="%FLUENT_PACKAGE_TOPDIR%/etc/fluent/fluentd.conf"
+set FLUENT_PLUGIN="%FLUENT_PACKAGE_TOPDIR%/etc/fluent/plugin"
+set FLUENT_PACKAGE_VERSION="%FLUENT_PACKAGE_TOPDIR%/bin/fluent-package-version.rb"
 for %%p in (%*) do (
     if "%%p"=="--version" (
-        ruby "%FLUENT_PACKAGE_VERSION%"
+        ruby %FLUENT_PACKAGE_VERSION%
         goto last
     )
 )