Bug 1200951 - Use the same poison patterns for jemalloc4 as mozjemalloc. r=glandium

--HG--
extra : rebase_source : c44d6020934f16e53ce1c3553c5f952981bceb03

memory/jemalloc/moz.build

@@ -72,6 +72,8 @@ if CONFIG['GNU_CC']:
     CFLAGS += ['-std=gnu99']
 
 DEFINES['abort'] = 'moz_abort'
+DEFINES['JEMALLOC_ALLOC_JUNK'] = '((uint8_t)0xe4)'
+DEFINES['JEMALLOC_FREE_JUNK']  = '((uint8_t)0xe5)'
 
 LOCAL_INCLUDES += [
     '!src/include',