Remove bashifications
https://bugs.gentoo.org/287130

--- a/configure
+++ b/configure
@@ -4874,7 +4874,7 @@ ac_config_files="$ac_config_files version.h:config/version.h.in"
 
 # 1.234<whatever> -> 1234<whatever>
 case "$PACKAGE_VERSION" in
-[0-9].*) eu_version="${PACKAGE_VERSION/./}" ;;
+[0-9].*) eu_version=`echo "$PACKAGE_VERSION" | sed 's@\.@@'` ;;
 *)     	   as_fn_error "confused by version number '$PACKAGE_VERSION'" "$LINENO" 5 ;;
 esac
 case "$eu_version" in
@@ -4903,7 +4903,7 @@ case "$eu_version" in
 esac
 
 # Round up to the next release API (x.y) version.
-eu_version=$[($eu_version + 999) / 1000]
+eu_version=`expr \( $eu_version + 999 \) / 1000`
 
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure