Avoid bashism in configure script

&> is non-standard for redirecting stdin and stderr. It is a short-hand copied
from csh's >& by zsh and later bash. It is equivalent to >word 2>&1 which will
also work in dash (/bin/sh on Debian) or other plain Bourne/POSIX shells.

Signed-off-by: Oliver Kiddle <okiddle@yahoo.co.uk>

Author: okapia

configure.ac

@@ -29,7 +29,7 @@ AC_SUBST([PRERELEASE_VERSION],
 AC_DEFINE([PRERELEASE_VERSION], "PRERELEASE_VERSION_NUMBER",
           [Prerelease version number of package])
 
-AM_CONDITIONAL([GIT_CHECKOUT], [git log -1 &>/dev/null])
+AM_CONDITIONAL([GIT_CHECKOUT], [git log -1 >/dev/null 2>&1])
 
 m4_pattern_allow([AM_SILENT_RULES])
 AM_SILENT_RULES