cmd: Remove execute permission on source files.
diff --git a/programs/cmd/batch.c b/programs/cmd/batch.c
old mode 100755
new mode 100644
diff --git a/programs/cmd/builtins.c b/programs/cmd/builtins.c
old mode 100755
new mode 100644
diff --git a/programs/cmd/wcmd.h b/programs/cmd/wcmd.h
old mode 100755
new mode 100644
diff --git a/programs/cmd/wcmdmain.c b/programs/cmd/wcmdmain.c
old mode 100755
new mode 100644