[PATCH] configure: do not use '@' in version string

[Benoît Thébaudeau]

# HG changeset patch
# User "Benoît Thébaudeau" <benoit.thebaudeau@advansee.com>
# Date 1327938770 -3600
# Node ID 72ca07b6c16b4eb638348fbc5ff4b366fc016dcf
# Parent  69624316223712c757642b426e63c1f8f7b1958f
configure: do not use '@' in version string

#0a0410dd0cb0 broke #0cc4d6352c3e. This patch fixes this, which fixes the build
of gcc/glibc/gdb manuals.

Signed-off-by: "Benoît Thébaudeau" <benoit.thebaudeau@advansee.com>

diff --git a/configure.ac b/configure.ac
--- a/configure.ac
+++ b/configure.ac
@@ -307,7 +307,7 @@
         [rev_id="$( hg log -r . --template '{branch}-{node|short}\n' \
                            2>/dev/null                               \
                     || true                                          )"
-         PACKAGE_VERSION="${PACKAGE_VERSION}@${rev_id:-unknown-$( date +%Y%m%d.%H%M%S )}"
+         PACKAGE_VERSION="${PACKAGE_VERSION}+${rev_id:-unknown-$( date +%Y%m%d.%H%M%S )}"
         ])])
 # Arrange to have no / in the directory name, no need to create an
 # arbitrarily deep directory structure