Some windows fixes.

dependencies.py

@@ -137,7 +137,11 @@ class ExternalProgram():
             self.fullpath = [shutil.which(name)]
             if self.fullpath[0] is None and search_dir is not None:
                 trial = os.path.join(search_dir, name)
-                if os.access(trial, os.X_OK):
+                suffix = os.path.splitext(trial)[-1].lower()
+                if environment.is_windows() and (suffix == 'exe' or suffix == 'com'\
+                                          or suffix == 'bat'):
+                    self.fullpath = [trial]
+                elif not environment.is_windows() and os.access(trial, os.X_OK):
                     self.fullpath = [trial]
                 else:
                     # Now getting desperate. Maybe it is a script file that is a) not chmodded

ninjabackend.py

@@ -1079,12 +1079,12 @@ rule FORTRAN_DEP_HACK
         else:
             rel_src = os.path.join(self.build_to_src, target.get_source_subdir(), src)
             abs_src = os.path.join(self.environment.get_build_dir(), rel_src)
-        if os.path.isabs(src):
+        if isinstance(src, RawFilename):
+            src_filename = src.fname
+        elif os.path.isabs(src):
             src_filename = os.path.basename(src)
         else:
             src_filename = src
-        if isinstance(src, RawFilename):
-            src_filename = src.fname
         obj_basename = src_filename.replace('/', '_').replace('\\', '_')
         rel_obj = os.path.join(self.get_target_private_dir(target), obj_basename)
         rel_obj += '.' + self.environment.get_object_suffix()