Rework fakechroot checking

Do the checks in the tests that need it, and get rid of some of the
cluttered output when it is not available (one line per test run).

Signed-off-by: Dan McGee <dan@archlinux.org>

pactest/pmtest.py

@@ -197,9 +197,7 @@ def run(self, pacman):
                 cmd.append("fakeroot")
 
             fakechroot = which("fakechroot")
-            if not fakechroot:
-                print "WARNING: fakechroot not found, scriptlet tests WILL fail!!!"
-            else:
+            if fakechroot:
                 cmd.append("fakechroot")
 
         if pacman["gdb"]:

pactest/tests/scriptlet001.py

@@ -14,3 +14,7 @@
 self.addrule("PACMAN_RETCODE=0")
 self.addrule("PACMAN_OUTPUT=" + pre)
 self.addrule("PACMAN_OUTPUT=" + post)
+
+fakechroot = which("fakechroot")
+if not fakechroot:
+	self.expectfailure = True

pactest/tests/scriptlet002.py

@@ -14,3 +14,7 @@
 self.addrule("PACMAN_RETCODE=0")
 self.addrule("PACMAN_OUTPUT=" + pre)
 self.addrule("PACMAN_OUTPUT=" + post)
+
+fakechroot = which("fakechroot")
+if not fakechroot:
+	self.expectfailure = True