Major layout change to the packages directory

Having one monolithic packages directory makes it hard to find things
and is generally overwhelming. This commit splits it into several
logical sections roughly based on function, recipes.txt gives more
information about the classifications used.

The opportunity is also used to switch from "packages" to "recipes"
as used in OpenEmbedded as the term "packages" can be confusing to
people and has many different meanings.

Not all recipes have been classified yet, this is just a first pass
at separating things out. Some packages are moved to meta-extras as
they're no longer actively used or maintained.

Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

meta/recipes-devtools/perl/files/letgcc-find-errno.patch

@@ -0,0 +1,42 @@
+This removes all the logic that perl uses to locate an appropriate
+errno.h for the target. Instead we simple create a file that does
+
+  #include "errno.h"
+
+and use that as the file to parse. This is needed when using an
+external toolchain since perl will search in ${STAGING_INCDIR} for
+errno.h (when using gcc) and that isn't where it's located - its
+wherever the external toolchain keeps it's headers.
+
+--- perl-5.8.8/ext/Errno/Errno_pm.PL	2007/04/30 14:10:10	1.1
++++ perl-5.8.8/ext/Errno/Errno_pm.PL	2007/04/30 14:21:35
+@@ -11,8 +11,18 @@
+ open OUT, ">Errno.pm" or die "Cannot open Errno.pm: $!";
+ select OUT;
+ my $file;
+-my @files = get_files();
+-if ($Config{gccversion} ne '' && $^O eq 'MSWin32') {
++#my @files = get_files();
++my @files = ("errno.h");
++
++if (1) {
++    open INCS, '>includes.c' or
++	die "Cannot open includes.c";
++    print INCS qq[#include "errno.h"\n];
++    close INCS;
++    process_file('includes.c');
++    unlink 'includes.c';
++}
++elsif ($Config{gccversion} ne '' && $^O eq 'MSWin32') {
+     # MinGW complains "warning: #pragma system_header ignored outside include
+     # file" if the header files are processed individually, so include them
+     # all in .c file and process that instead.
+@@ -44,7 +54,7 @@
+         chomp($file = `cygpath -w "$file"`);
+     }
+ 
+-    return unless defined $file and -f $file;
++#    return unless defined $file and -f $file;
+ #   warn "Processing $file\n";
+ 
+     local *FH;