run.in: Set more debug env variables

This can help improve debug experience and catch memory bugs better.

run.in

-#!/bin/sh
+#!/bin/bash
 set -e
 
 ABS_BUILDDIR='@ABS_BUILDDIR@'
@@ -6,4 +6,5 @@ ABS_SRCDIR='@ABS_SRCDIR@'
 
 export GSETTINGS_SCHEMA_DIR="${ABS_BUILDDIR}/data"
 set -x
-exec "${ABS_BUILDDIR}/src/chatty" "$@"
+export MALLOC_PERTURB_="$(($RANDOM % 255 + 1))"
+MALLOC_CHECK_=2 exec "${ABS_BUILDDIR}/src/chatty" "$@"