Use bash features to improve $distfiles parsing.

That means that it's not necessary anymore to use an '@' before the
extract suffix string. yay.

--HG--
extra : convert_revision : 83ce2c783cb917ef59b87eacb0565cfcff277218

templates/glibc.tmpl

@@ -2,7 +2,7 @@
 pkgname=glibc
 version=2.8
 wrksrc="libc"
-distfiles="ftp://ftp.archlinux.org/other/glibc/$pkgname-2.8_20080828@.tar.bz2"
+distfiles="ftp://ftp.archlinux.org/other/glibc/$pkgname-2.8_20080828.tar.bz2"
 build_style=gnu_configure
 configure_env="ac_cv_path_BASH_SHELL=/bin/bash"
 configure_script="../configure"