Makefile error corrections and minor tweaks

- Fixed some variable names incorrectly entered as literals in target
  names
- This fixes a build failure when trying to build any specific
  sub-project directly from src/*/
- Removed an old svn-related command from the 'import' recipe
- This fixes the build failures when trying to run 'make tools' right
  after 'make clean'
- Removed duplicate entries in the 'clean' recipe for map and login
  servers

Signed-off-by: Haru <haru@dotalux.com>