[gnome-music] README: Clarify jhbuild instructions

[Michael Catanzaro <mcatanzaro src gnome org>]

commit cb963ca63b5a537613904a49da8ff11884482b0f
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Mon Apr 4 09:50:36 2016 -0500

    README: Clarify jhbuild instructions
    
    sysdeps are important.

 README |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/README b/README
index 9826374..52eb74f 100644
--- a/README
+++ b/README
@@ -18,10 +18,11 @@ You can join us on the IRC:
 Follow the BuildGnome tutorial for newcomers at https://wiki.gnome.org/Newcomers/BuildGnome
 
 After installing jhbuild, you have to build gnome-music and all its dependencies. The task can be done by 
simply running:
+$ jhbuild sysdeps --install gnome-music
 $ jhbuild build gnome-music
 
 Finally, start gnome music with:
-$ jhbuild run gnome-music"
+$ jhbuild run gnome-music
 
 === Troubleshooting ===