Merge pull request #324 from swiftlang/github/eng/fix-ifconfig-dep

[windows] add _CompilerSwiftIfConfig dependency to the swift-syntax i…

Author: hyp

platforms/Windows/bld/bld.wxs

@@ -387,6 +387,9 @@
       <Component>
         <File Source="$(TOOLCHAIN_ROOT)\usr\bin\_CompilerSwiftIDEUtils.dll" />
       </Component>
+      <Component>
+        <File Source="$(TOOLCHAIN_ROOT)\usr\bin\_CompilerSwiftIfConfig.dll" />
+      </Component>
       <Component>
         <File Source="$(TOOLCHAIN_ROOT)\usr\bin\_CompilerSwiftOperators.dll" />
       </Component>