Use the directory tree created by the install target for Linux

Use the directory tree created by the install target for Linux
installation
Print an informative message in all instances where CreateSystemRootLink
fails
Corrected tools/helper.mk, use the right dll name when building an import
library but also give the target the same name as the import library.
Corrected bad target directory for install target in apps/test

svn path=/trunk/; revision=2215