[sushi] Add RUN_DEBUG environment variable

[Cosimo Cecchi <cosimoc src gnome org>]

commit 5bcd06270b655b285dffc1085e186ee32e583f24
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Wed Jul 22 12:34:54 2015 -0700

    Add RUN_DEBUG environment variable
    
    When executed with RUN_DEBUG=1, we will start sushi under gdb.

 src/sushi.in |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)
---
diff --git a/src/sushi.in b/src/sushi.in
index 4d5c896..bbed8e9 100644
--- a/src/sushi.in
+++ b/src/sushi.in
@@ -12,4 +12,9 @@ if test x"$GJS_DEBUG_TOPICS" = x ; then
     export GJS_DEBUG_TOPICS="JS ERROR;JS LOG"
 fi
 
- libexecdir@/sushi-start
+DEBUG_COMMAND=""
+if [ "$RUN_DEBUG" != "" ]; then
+    DEBUG_COMMAND="gdb --args"
+fi
+
+exec $DEBUG_COMMAND @libexecdir@/sushi-start