wavemon: import from old packages, update to v0.7.6

Signed-off-by: Jonathan McCrohan <jmccrohan@gmail.com>
Hi Etienne,

This would drop `TARGET_CFLAGS` completely. I assume you meant something like below?

```
+TARGET_CFLAGS += -libpthread
+
 MAKE_FLAGS += \
-       CFLAGS="$(TARGET_CFLAGS) -pthread -L$(STAGING_DIR)/usr/lib -I$(STAGING_DIR)/usr/include"
+       CFLAGS="$(TARGET_CFLAGS) -L$(STAGING_DIR)/usr/lib -I$(STAGING_DIR)/usr/include"
```

Either works, I guess it is just a matter of preference. :-)

Jon