[cogl] Fix the help string for --enable-standalone

[Neil Roberts <nroberts src gnome org>]

commit fb6a582ae41a5511c837846e8fbac46462fce93d
Author: Neil Roberts <neil linux intel com>
Date:   Mon Aug 19 15:54:20 2013 +0100

    Fix the help string for --enable-standalone
    
    The help string had the wrong name presumably resulting from a cut and
    paste error of the --enable-debug option.
    
    Reviewed-by: Robert Bragg <robert linux intel com>
    Reviewed-by: Damien Lespiau <damien.lespiau at intel.com>

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index c5d5660..6c79dbe 100644
--- a/configure.ac
+++ b/configure.ac
@@ -240,7 +240,7 @@ dnl     ============================================================
 
 AC_ARG_ENABLE(
   [standalone],
-  [AC_HELP_STRING([--enable-debug=@<:@no/yes@:>@], [Build Cogl without any external depedency 
@<:@default=no@:>@])],
+  [AC_HELP_STRING([--enable-standalone=@<:@no/yes@:>@], [Build Cogl without any external depedency 
@<:@default=no@:>@])],
   [],
   enable_standalone=no
 )