Moving dgen_ scripts out of validator_arm into a common directory.

src/trusted/validator_arm/build.scons

Index: src/trusted/validator_arm/build.scons
diff --git a/src/trusted/validator_arm/build.scons b/src/trusted/validator_arm/build.scons
old mode 100644
new mode 100755
index 685ccdc9a96ffc2f79e655fb154b3cee37083d89..0e382b62278ca114ab46702b36a2700ef7d36287
--- a/src/trusted/validator_arm/build.scons
+++ b/src/trusted/validator_arm/build.scons
@@ -31,6 +31,9 @@ env.Append(
 #       up to date.
 gen_env = env.Clone();
 
+# Defines dgen directory inside of common arch-independent validator directory.
+DGEN_SRC_DIR = '${MAIN_DIR}/src/trusted/validator/dgen'
+
 # Defines this source directory.
 GEN_SRC_DIR = '${MAIN_DIR}/src/trusted/validator_arm/gen'
 
@@ -38,6 +41,10 @@ GEN_SRC_DIR = '${MAIN_DIR}/src/trusted/validator_arm/gen'
 def _gen_file(filename):
   return '%s/%s' % (GEN_SRC_DIR, filename)
 
+# Defines the full file name for a file inside dgen directory.
+def _dgen_dir_file(filename):
+  return '%s/%s' % (DGEN_SRC_DIR, filename)
+
 # Set of generated source files.
 GEN_LIST = [_gen_file(x) for x in
             ['arm32_decode.cc', 'arm32_decode.h',
@@ -59,13 +66,13 @@ if generate:
 def _generate_source(filename):
   env.Command(target=filename,
               source=['armv7.table',
-                      'generate_decoder.py',
-                      'dgen_core.py',
-                      'dgen_input.py',
-                      'dgen_opt.py',
-                      'dgen_output.py',
-                      'dgen_decoder_output.py',
-                      'dgen_test_output.py',
+                      _dgen_dir_file('generate_decoder.py'),
+                      _dgen_dir_file('dgen_core.py'),
+                      _dgen_dir_file('dgen_input.py'),
+                      _dgen_dir_file('dgen_opt.py'),
+                      _dgen_dir_file('dgen_output.py'),
+                      _dgen_dir_file('dgen_decoder_output.py'),
+                      _dgen_dir_file('dgen_test_output.py'),
                       ],
               action=['${SOURCES[1].abspath} ${SOURCES[0].abspath} '
                       '${TARGET.abspath} Arm32DecoderState'])