testbot/testagentd: 'make clean' should not fail if some files don't exist.

[Francois Gouget]

---
 testbot/src/testagentd/Makefile |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/testbot/src/testagentd/Makefile b/testbot/src/testagentd/Makefile
index f6035be..417120e 100644
--- a/testbot/src/testagentd/Makefile
+++ b/testbot/src/testagentd/Makefile
@@ -40,6 +40,6 @@ winetestbot.iso: TestAgentd.exe
 
 
 clean:
-	rm *.obj *.o
-	rm TestAgentd.exe
-	rm winetestbot.iso
+	rm -f *.obj *.o
+	rm -f TestAgentd.exe
+	rm -f winetestbot.iso
-- 
1.7.10.4