readme: fix symlink instructions

Signed-off-by: Joel Fernandes <joel@joelfernandes.org>
diff --git a/README.md b/README.md
index 09a5223..293669b 100644
--- a/README.md
+++ b/README.md
@@ -50,8 +50,8 @@
 cd androdeb
 
 # Add some short cuts:
-sudo ln -s ./adeb /usr/bin/adeb
-sudo ln -s ./androdeb /usr/bin/androdeb
+sudo ln -s $(pwd)/adeb /usr/bin/adeb
+sudo ln -s $(pwd)/androdeb /usr/bin/androdeb
 ```
 
 * Fastest way of installing adeb onto your device: