Major infrastructure changes, part 2.

* Moved helpers, common and triggers dirs into xbps-src, where
  they belong.
* Renamed the templates dir to srcpkgs, it was so redundant before.
* Make it possible to add subpkgs with no restriction in names, for
  example udev now has a subpkgs called "libgudev". Previously
  subpkgs were named "${sourcepkg}-${pkgname}".
* xbps-src: changed to look for template files in current directory.
  That means that most arguments from the targets have been removed.
* xbps-src: added a reinstall target, to remove + install.
* xbps-src: do not overwrite binpkgs by default, skip them.

And more that I forgot because it's a mega-commit that I've been
working for some days already...

--HG--
extra : convert_revision : 0f466878584d1e6895d2a234f07ea1b2d1e61b3e

srcpkgs/patch/template

@@ -0,0 +1,20 @@
+# Template file for 'patch'
+pkgname=patch
+version=2.5.9
+distfiles="ftp://alpha.gnu.org/gnu/diffutils/patch-$version.tar.gz"
+build_style=gnu_configure
+make_install_args="prefix=$XBPS_DESTDIR/$pkgname-$version/usr
+ mandir=$XBPS_DESTDIR/$pkgname-$version/usr/share/man"
+short_desc="Patch files using diff output"
+maintainer="Juan RP <xtraeme@gmail.com>"
+checksum=ecb5c6469d732bcf01d6ec1afe9e64f1668caba5bfdb103c28d7f537ba3cdb8a
+long_desc="
+ 'patch' takes a patch file containing a difference listing
+ produced by diff and applies those differences to one or
+ more original files, producing patched versions.
+
+ This is the GPL version from the Free Software Foundation."
+
+base_chroot=yes
+
+Add_dependency run glibc