Update build_style for all templates.

- There's no need to set build_style for custom-install (default).
- gnu_{configure,makefile} renamed to gnu-{configure,makefile}.

srcpkgs/evolution-data-server/template

@@ -3,7 +3,7 @@ pkgname=evolution-data-server
 version=3.2.1
 homepage="http://www.gnome.org"
 distfiles="${GNOME_SITE}/$pkgname/3.2/$pkgname-$version.tar.xz"
-build_style=gnu_configure
+build_style=gnu-configure
 configure_args="--with-openldap
 --with-krb5=/usr --with-nspr-includes=/usr/include/nspr
 --with-nss-includes=/usr/include/nss --enable-vala-bindings"