Bug 1426553 - Autoconf-related changes to spidermonkey jobs. r=nalexander

On Debian, the autoconf binary is autoconf2.13 while it is autoconf-2.13
on Centos.

In make-source-package.sh, we need to run autoconf to generate the
old-configure to include in the package, so try both.

In hazard-analysis.sh, we actually don't need autoconf itself, so just
copy configure.in to configure.

--HG--
extra : rebase_source : d21075394c69cd7cd6738da645173eb29f4a1259

js/src/make-source-package.sh

@@ -7,7 +7,7 @@ set -e
 
 : ${MKDIR:=mkdir}
 : ${TAR:=tar}
-: ${AUTOCONF:=autoconf-2.13}
+: ${AUTOCONF:=$(which autoconf-2.13 autoconf2.13 | head -1)}
 : ${SRCDIR:=$(cd $(dirname $0); pwd 2>/dev/null)}
 : ${MOZJS_NAME:=mozjs}
 # The place to gather files to be added to the tarball.

taskcluster/scripts/builder/hazard-analysis.sh

@@ -39,7 +39,8 @@ function build_js_shell () {
     (
     unset MOZ_OBJDIR
     unset MOZCONFIG
-    ( cd $JS_SRCDIR; autoconf-2.13 )
+    cp -P $JS_SRCDIR/configure.in $JS_SRCDIR/configure
+    chmod +x $JS_SRCDIR/configure
     if [[ -z "$HAZ_DEP" ]]; then
         [ -d $HAZARD_SHELL_OBJDIR ] && rm -rf $HAZARD_SHELL_OBJDIR
     fi