t/*: some cleanups so switching between redo and minimal/do works.

Because the two programs use separate state databases, it helps if we
clean up some temp files between runs.  Otherwise they might think you
created some targets "by hand" and refuse to rebuild them.

t/102-empty/silencetest.do

@@ -1,3 +1,7 @@
+# This may have been leftover from a previous run, when switching
+# between "real" redo and minimal/do, so clean it up.
+rm -f silence
+
 echo 'echo hello' >silence.do
 redo silence
 [ -e silence ] || exit 55

t/102-empty/touchtest.do

@@ -1,3 +1,7 @@
+# This may have been leftover from a previous run, when switching
+# between "real" redo and minimal/do, so clean it up.
+rm -f touch1
+
 echo 'echo hello' >touch1.do
 redo touch1
 [ -e touch1 ] || exit 55

t/201-fail/all.do

@@ -12,3 +12,7 @@ touch fail
 ../flush-cache
 # since we created this file by hand, fail.do won't run, so it won't fail.
 redo-ifchange fail >/dev/null 2>&1 || exit 55  # expected to pass
+
+# Make sure we don't leave this lying around for future runs, or redo
+# might mark it as "manually modified" (since we did!)
+rm -f fail

t/350-deps/overwrite.do

@@ -1,5 +1,4 @@
 . ../skip-if-minimal-do.sh
-
 redo overwrite1 2>&1 && exit 55
 redo overwrite2 2>&1 && exit 56
 redo overwrite3 2>&1 && exit 57

t/350-deps/test1.do

@@ -1,3 +1,7 @@
+# This may have been leftover from a previous run, when switching
+# between "real" redo and minimal/do, so clean it up.
+rm -f t1a
+
 # force-rebuild t1dep
 redo t1dep
 

t/355-deps-cyclic/all.do

@@ -1,2 +1,5 @@
+# minimal/do doesn't need to "support" cyclic dependencies, because
+# they're always a bug in the .do scripts :)
 . ../skip-if-minimal-do.sh
+
 ! redo a >/dev/null 2>&1 || exit 204

t/360-symlinks/all.do

@@ -11,6 +11,8 @@ redo-ifchange b
 d2=$(cat b.did)
 [ "$d1" = "$d2" ] || exit 12
 
+. ../skip-if-minimal-do.sh
+
 # forcibly changing a should rebuild b.
 # a is already symlink to a.extra, but redo shouldn't care about the
 # target of symlinks, so it shouldn't freak out that a.extra has changed.