This refactors 3 functions out of ShellCommandLib and puts them into a new library (but as 2 functions instead of 3). This allows for users outside of the shell itself to have access to these functions.

1) Remove the 3 functions out of the shell's internal library (ShellCommandLib)
2) Add a new library class (PathLib)
3) Add an instance of this class (BasePathLib)
4) Change all internal shell callers to use this new library class.

signed-off-by: jcarsey
reviewed-by: jljusten

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11936 6f19259b-4bc3-4df7-8a09-765794883524

ShellPkg/Library/UefiShellLevel2CommandsLib/Mv.c

@@ -148,7 +148,7 @@ GetDestinationLocation(
       return (SHELL_OUT_OF_RESOURCES);
     }
     StrCpy(DestPath, Cwd);
-    while (ChopLastSlash(DestPath)) ;
+    while (PathRemoveLastItem(DestPath)) ;
     *DestPathPointer =  DestPath;
     return (SHELL_SUCCESS);
   }
@@ -268,7 +268,7 @@ ValidateAndMoveFiles(
   if (ShellStatus != SHELL_SUCCESS) {
     return (ShellStatus);
   }
-  DestPath = CleanPath(DestPath);
+  DestPath = PathCleanUpDirectories(DestPath);
 
   HiiOutput   = HiiGetString (gShellLevel2HiiHandle, STRING_TOKEN (STR_MV_OUTPUT), NULL);
   HiiResultOk = HiiGetString (gShellLevel2HiiHandle, STRING_TOKEN (STR_GEN_RES_OK), NULL);