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/gperf/template

@@ -0,0 +1,28 @@
+# Template file for 'gperf'
+pkgname=gperf
+version=3.0.3
+revision=1
+distfiles="http://ftp.gnu.org/gnu/$pkgname/$pkgname-$version.tar.gz"
+build_style=gnu_configure
+short_desc="Perfect hash function generator"
+maintainer="Juan RP <xtraeme@gmail.com>"
+checksum=63287527c8d9e27e801cf0804436f3494bd569db05d49dcdd2a942ae72fa9055
+long_desc="
+ GNU gperf is a perfect hash function generator. For a given list of strings,
+ it produces a hash function and hash table, in form of C or C++ code, for
+ looking up a value depending on the input string. The hash function is
+ perfect, which means that the hash table has no collisions, and the hash
+ table lookup needs a single string comparison only.
+
+ GNU gperf is highly customizable. There are options for generating C or C++
+ code, for emitting switch statements or nested ifs instead of a hash table,
+ and for tuning the algorithm employed by gperf."
+
+Add_dependency full	glibc
+Add_dependency run	libstdc++
+Add_dependency build	texinfo
+
+post_install()
+{
+	touch -f ${DESTDIR}/usr/share/info/dir
+}