Update emacs dir-locals: fix compile command, add 8 ws indent.

Author: edenhill

.dir-locals.el

@@ -1,3 +1,7 @@
-( (c-mode . ((c-file-style . "linux"))) )
-((nil . ((compile-command . "LC_ALL=C make -C $(git rev-parse --show-toplevels) -k"))))
-
+((nil
+  (compile-command . "LC_ALL=C make -C $(git rev-parse --show-toplevel) -kw -j"))
+ (c-mode
+  (c-file-style . "linux")
+  (tab-width . 8)
+  (indent-tabs-mode . nil))
+)