ShellPkg: Fix "for" command statement initialization.

ShellPkg: Fix "for" command statement initialization.

The shell was failing to correctly parse up to the space only for “run (1 3)” and also losing the space for “in ” a b” c” for loop initialization.  This fixes for initialization to be correct.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jaben Carsey <jaben.carsey@intel.com>
Reviewed-by: Erik Bjorge <erik.c.bjorge@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14997 6f19259b-4bc3-4df7-8a09-765794883524