when doing "make install" (they are not needed/useful) outside the build tree. Added
  "mysql_client_test" to the "MySQL-bench" RPM.
- some small RPM spec file improvements (more variables than hard-coded values, cleanups)


scripts/Makefile.am:
  - no need to install "make_win_src_distribution" and "make_win_binary_distribution"
    in "make install" (BUG#10676)
support-files/mysql.spec.sh:
  - added mysql_client_test to the "bench" subpackage (BUG 10676)
  - use "mysqldatadir" variable instead of hard-coding the path multiple times
  - use the "mysqld_user" variable on all occasions a user name is referenced
  - removed (incomplete) Brazilian translations
  - removed redundant release tags from the subpackage descriptions