[PATCH] build: don't shadow debug with "@debug@" in tools build

[Wei Liu <wei.liu2@citrix.com>]

In 16181cbb (tools: Honor Config.mk debug value, rather than setting our
own), configure doesn't set debug variable anymore. There is, however,
one place that was missed. The file config/Tools.mk.in was still
expecting a @debug@ value from configure. After 16181cbb that value
remained "debug := @debug@" all the time because configure didn't
substitute it.

The consequence was that we couldn't get a debug build even if debug was
set to "y" in Config.mk.

Fix this by removing the stray line "debug := @debug@" in Tools.mk.in.

Reported-by: Fabio Fantoni <fabio.fantoni@m2r.biz>
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
---
Cc: Fabio Fantoni <fabio.fantoni@m2r.biz>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Ian Jackson <ian.jackson@eu.citrix.com>
Cc: George Dunlap <george.dunlap@eu.citrix.com>

Backport candidate for 4.6.
---
 config/Tools.mk.in | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/config/Tools.mk.in b/config/Tools.mk.in
index 9bd5f6c..ccfe137 100644
--- a/config/Tools.mk.in
+++ b/config/Tools.mk.in
@@ -5,9 +5,6 @@ ifeq ($(CONFIG_RUMP),y)
 XEN_OS              := NetBSDRump
 endif
 
-# A debug build of tools?
-debug               := @debug@
-
 # Tools path
 BISON               := @BISON@
 FLEX                := @FLEX@
-- 
2.1.4