Add -MT

Unbreaks dependency generation for audio, slirp and tests

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4828 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/Makefile b/Makefile
index 22d1dee..a4dcc58 100644
--- a/Makefile
+++ b/Makefile
@@ -10,7 +10,7 @@
 CFLAGS += $(OS_CFLAGS) $(ARCH_CFLAGS)
 LDFLAGS += $(OS_LDFLAGS) $(ARCH_LDFLAGS)
 
-CPPFLAGS += -I. -I$(SRC_PATH) -MMD -MP
+CPPFLAGS += -I. -I$(SRC_PATH) -MMD -MP -MT $@
 CPPFLAGS += -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
 LIBS=
 ifdef CONFIG_STATIC