[loc] use a single rufus.loc as translator base

* Remove the need to maintain a new_translation.loc
* Add a sed invocation to remove comments and unwanted stuff
  to generate a final embedded.loc
* Note: sed is only invoked for MinGW.
  MS compilers still embed the unmodified rufus.loc.
* Also fix a small bug when parsing the version.

bootstrap.sh

@@ -1,6 +1,5 @@
 #!/bin/sh
 aclocal || exit 1
-#autoheader || exit 1
 automake -a -c || exit 1
 autoconf || exit 1
 rm -rf autom4te.cache