Massive changes to allow installing pkgs in a chroot.

Some changes include:
 - Xstow is not used anymore, files are copied into masterdir.
 - a new target install-chroot has been created.
 - a new meta-template xbps-base-chroot has been created required for
   the install-chroot target.
 - Removed XBPS_SYSCONFDIR, /etc is used by default.
Other changes that I cannot remember right now...

--HG--
extra : convert_revision : fb57d9dafb56aeb03cc935580172e075ce584fd5

templates/pcre.tmpl

@@ -4,7 +4,6 @@ version=7.8
 distfiles="
 http://kent.dl.sourceforge.net/sourceforge/pcre/$pkgname-$version@.tar.bz2"
 build_style=gnu_configure
-pkgconfig_override="libpcre.pc libpcrecpp.pc"
 configure_args="--enable-utf8 --enable-unicode-properties"
 short_desc="Perl Compatible Regular Expressions"
 maintainer="Juan RP <xtraeme@gmail.com>"
@@ -16,4 +15,4 @@ long_desc="
  correspond to the POSIX regular expression API. The PCRE library is free,
  even for building commercial software."
 
-build_depends="libtool-2.2.6a"
+run_depends="glibc-2.8"