Move some of the tests from t/ into t/defaults-flat.

This lets us move t/default.do out of the way; it was confusing otherwise.

t/all.do

@@ -1,2 +1,2 @@
-redo-ifchange hello yellow bellow c d example/all
+redo-ifchange hello yellow bellow defaults-flat/all example/all
 

t/clean.do

@@ -1,5 +1,6 @@
-redo example/clean curse/clean deps/clean "space dir/clean" stamp/clean
-rm -f c c.c c.c.c c.c.c.b c.c.c.b.b d mode1 makedir.log chdir1 deltest2 \
+redo example/clean curse/clean deps/clean "space dir/clean" stamp/clean \
+	defaults-flat/clean
+rm -f mode1 makedir.log chdir1 deltest2 \
 	hello [by]ellow *.o *~ .*~ *.log CC LD passfail silence silence.do \
 	touch1 touch1.do always1 ifcreate[12].dep ifcreate[12]
 rm -rf makedir

t/defaults-flat/all.do

@@ -0,0 +1 @@
+redo-ifchange c d

t/defaults-flat/clean.do

@@ -0,0 +1,2 @@
+rm -f c c.c c.c.c c.c.c.b c.c.c.b.b d \
+	*~ .*~

t/defaults-flat/default.b.do

@@ -7,4 +7,4 @@ else
 	echo b-to-b
 	cat "$1$2.b"
 fi
-./sleep 1.1
+../sleep 1.1

t/defaults-flat/default.c.c.do

@@ -1,4 +1,4 @@
 redo-ifchange $1$2.b
 echo b-to-cc
 cat $1$2.b
-./sleep 1.2
+../sleep 1.2

t/defaults-flat/default.c.do

@@ -1,4 +1,4 @@
 redo-ifchange $1$2.c
 echo c-to-c
 cat $1$2.c
-./sleep 1.3
+../sleep 1.3

t/defaults-flat/default.do

@@ -1,4 +1,4 @@
 redo-ifchange c
 echo default-rule
 cat c
-./sleep 1.4
+../sleep 1.4