[gucharmap] build: Also check for bsd names of coreutils programmes

[Christian Persch <chpe src gnome org>]

commit c4fab1fe5659c9d758429c8d599764bd8a2d255d
Author: Christian Persch <chpe gnome org>
Date:   Tue May 3 21:57:21 2016 +0200

    build: Also check for bsd names of coreutils programmes
    
    Check for the g-prefixed programme first.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=765630

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 3350844..53efd9f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -211,7 +211,7 @@ fi
 
 AC_ARG_VAR([SHA512SUM],[the sha512sum programme])
 if test -z "$SHA512SUM"; then
-  AC_PATH_PROG([SHA512SUM],[sha512sum],[false])
+  AC_PATH_PROGS([SHA512SUM],[gsha512sum sha512sum],[false])
   if test "$with_provided_unicode_data" = "no" -a "$WGET" = "false"; then
     AC_MSG_ERROR([sha512sum not found])
   fi