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/neon/template

@@ -3,7 +3,7 @@ pkgname=neon
 version=0.29.5
 revision=1
 distfiles="http://www.webdav.org/neon/neon-$version.tar.gz"
-build_style=gnu_configure
+build_style=gnu-configure
 configure_args="--with-expat --with-ssl=openssl --enable-shared
 --with-ca-bundle=/etc/ssl/certs/ca-certificates.crt"
 short_desc="HTTP and WebDAV client library, with a C interface"