Factor out all of the encumbered stuff into separate SConscript

files so the directories can easily be deleted.
Remove the FullCPU from the ALL_CPU_LIST and only add it if
it exists.

--HG--
extra : convert_revision : b16f56bb92a0063803c5099732dc289fe4363768

SConstruct

@@ -320,8 +320,10 @@ env['ALL_ISA_LIST'] = ['alpha', 'sparc', 'mips']
 
 # Define the universe of supported CPU models
 env['ALL_CPU_LIST'] = ['AtomicSimpleCPU', 'TimingSimpleCPU',
-                       'FullCPU', 'O3CPU',
-                       'OzoneCPU']
+                       'O3CPU', 'OzoneCPU']
+
+if os.path.isdir(os.path.join(SRCDIR, 'src/encumbered/cpu/full')):
+    env['ALL_CPU_LIST'] += ['FullCPU']
 
 # Sticky options get saved in the options file so they persist from
 # one invocation to the next (unless overridden, in which case the new