Add existing mkgmap-svn package.
Rewrite mkgmap package

Do not create an executable shell script at /usr/bin/mkgmap by echoing lines of
code from the PKGBUILD. Instead, simply copy an executable shell script from
$srcdir to $pkgdir.

Polish PKGBUILD to make it shorter, cleaner and easier to understand. Properly
quote variable interpolations in both "PKGBUILD" and "mkgmap".
Rewrite mkgmap-svn. Update to version 2756

Update style of mkgmap-svn to match that of the mkgmap package, and ensure that
namcap emits no warnings.