Get BlockIo mapping interfaces working. Still need to work on detecting block size of devices, but you can map a .dmg file no problem at this point.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11724 6f19259b-4bc3-4df7-8a09-765794883524

InOsEmuPkg/Unix/Sec/PosixFileSystem.c

@@ -1533,7 +1533,7 @@ PosixFileSystmeThunkClose (
   }
 
   if (This->Private != NULL) {
-    if (Private->VolumeLabel == NULL) {
+    if (Private->VolumeLabel != NULL) {
       free (Private->VolumeLabel);
     }   
     free (This->Private);