Moved userspace libc to posix container directory.

Issues:
- MM0 needs separate subset of libc and not link with libposix
- FS0 needs separate subset of libc and not link with libposix
- libposix need transforming into a full-blown uclibc for test0
- libc really is a pseudo-libc that needs to be replaced as above.
- Done some hacking to avoid conflicts between pseudo-libc and libposix headers.

Now system working as original, (e.g. execve etc. working)

containers/posix/libc/SConscript

@@ -0,0 +1,45 @@
+# -*- mode: python; coding: utf-8; -*-
+
+#  Codezero -- a microkernel for embedded systems.
+#
+#  Copyright © 2009  B Labs Ltd
+#
+#  This program is free software: you can redistribute it and/or modify it under the terms of the GNU
+#  General Public License as published by the Free Software Foundation, either version 3 of the License, or
+#  (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+#  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+#  License for more details.
+#
+#  You should have received a copy of the GNU General Public License along with this program.  If not, see
+#  <http://www.gnu.org/licenses/>.
+#
+#  Author: Russel Winder
+
+Import('environment')
+
+variant = "userspace"
+e = environment.Clone()
+e.Append(CPPPATH = ['include', 'include/sys-' + variant + '/arch-' + environment['ARCH']])
+e.Append(CCFLAGS = '-nostdinc')
+
+source = \
+        Glob('src/*.c') + \
+        Glob('src/sys-' + variant + '/*.c') + \
+        Glob('src/sys-' + variant + '/arch-' + e['ARCH'] + '/*.c') + \
+        Glob('src/sys-' + variant + '/arch-' + e['ARCH'] + '/plat-' + e['PLATFORM'] + '/*.c') + \
+        Glob('src/arch-' + e['ARCH'] + '/*.c') + \
+        Glob('src/arch-' + e['ARCH'] + '/*.S')
+
+objects = e.StaticObject(source)
+Depends (objects, e['configFiles'])
+library = e.StaticLibrary('c-' + variant, objects)
+Depends (library, e['configFiles'])
+#runTime = e.StaticObject('crt/sys-' + variant + '/arch-' + e['ARCH'] + '/crt0.S')
+#Depends (runTime, e['configFiles'])
+
+#result = (library, runTime)
+result = (library)
+
+Return('result')