docs/manual: fix typo

depednencies -> dependencies

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit 531e96e98cc8cd6fb839349ea0f86c9d5706ec0f)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

docs/manual/adding-packages-waf.txt

@@ -34,7 +34,7 @@ will automatically download the tarball from this location.
 
 On line 10, we tell Buildroot what options to enable for libfoo.
 
-On line 11, we tell Buildroot the depednencies of libfoo.
+On line 11, we tell Buildroot the dependencies of libfoo.
 
 Finally, on line line 13, we invoke the +waf-package+
 macro that generates all the Makefile rules that actually allows the