Use sh instead of bash in tests.

tests/test-clone

@@ -1,27 +1,27
-#!/bin/bash
+#!/bin/sh
 
 mkdir a
 cd a
 hg init
 echo a > a
 hg add a
 hg commit -m test -d '0 0'
 
 # Default operation
 hg clone . ../b
 cd ../b
 cat a
 hg verify
 
 # No update
 hg clone -U . ../c
 cd ../c
 cat a
 hg verify
 
 # Default destination
 mkdir ../d
 cd ../d
 hg clone ../a
 cd a
 hg cat a

tests/test-clone-failure

@@ -1,41 +1,41
-#!/bin/bash
+#!/bin/sh
 
 # No local source
 hg clone a b
 echo $?
 
 # No remote source
 hg clone http://127.0.0.1:3121/a b
 echo $?
 rm -rf b # work around bug with http clone
 
 # Inaccessible source
 mkdir a
 chmod 000 a
 hg clone a b
 echo $?
 
 # Inaccessible destination
 mkdir b
 cd b
 hg init
 hg clone . ../a
 echo $?
 cd ..
 chmod 700 a
 rm -rf a b
 
 # Source of wrong type
 mkfifo a
 hg clone a b
 echo $?
 rm a
 
 # Default destination, same directory
 mkdir q
 cd q
 hg init
 cd ..
 hg clone q
 
 true