Linux v2.6.15-rc7

Ho ho ho.
diff --git a/Makefile b/Makefile
index f4218b5..f937f1f45 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 VERSION = 2
 PATCHLEVEL = 6
 SUBLEVEL = 15
-EXTRAVERSION =-rc6
+EXTRAVERSION =-rc7
 NAME=Sliding Snow Leopard
 
 # *DOCUMENTATION*