Make templates use /bin/bash instead of /bin/sh

[tpruzina]

Title says it all, templates contain stuff that some some shells spit right back (dash).

tatt -b 465700 && ./
< ... >
./lftp-useflags.sh: 7: ./lftp-useflags.sh: [[: not found
./lftp-useflags.sh: 9: ./lftp-useflags.sh: [[: not found
./lftp-useflags.sh: 12: ./lftp-useflags.sh: [[: not found

This renders all tests to fail:

USE='-gnutls -nls -socks5 -ssl' failed for =net-ftp/lftp-4.4.5
USE='gnutls -nls -socks5 -ssl' failed for =net-ftp/lftp-4.4.5
.....

Bash is still required dependency on gentoo for most (if not all) arches, thus this should be pretty safe (and simple) thing to do.

Thanks

[tom111]

Fixed. Thanks.