treewide: Update BB_DISKMON_DIRS use

Per [1][2], Yocto is starting to deprecate ABORT and has replaced
the "ABORT" action in BB_DISKMON_DIRS entries with "HALT".

1. https://wiki.yoctoproject.org/wiki/Inclusive_language
2. https://git.yoctoproject.org/poky/commit/?id=4f77505d94a8f6260933f457e9848d1d2fa98ce5

Tested:
Built obmc-phosphor-image successfully and eliminate the following
warnings:

```
WARNING: The BB_DISKMON_DIRS "ABORT" action has been renamed to
"HALT", update configuration
```

Signed-off-by: George Liu <liuxiwei@inspur.com>
Change-Id: If57d0ded9fac41e23b31b01e2a0e309ac7388148
diff --git a/meta-phosphor/conf/local.conf.sample b/meta-phosphor/conf/local.conf.sample
index 98e6bd2..b24f032 100644
--- a/meta-phosphor/conf/local.conf.sample
+++ b/meta-phosphor/conf/local.conf.sample
@@ -10,10 +10,10 @@
     STOPTASKS,${DL_DIR},1G,100K \
     STOPTASKS,${SSTATE_DIR},1G,100K \
     STOPTASKS,/tmp,100M,100K \
-    ABORT,${TMPDIR},100M,1K \
-    ABORT,${DL_DIR},100M,1K \
-    ABORT,${SSTATE_DIR},100M,1K \
-    ABORT,/tmp,10M,1K"
+    HALT,${TMPDIR},100M,1K \
+    HALT,${DL_DIR},100M,1K \
+    HALT,${SSTATE_DIR},100M,1K \
+    HALT,/tmp,10M,1K"
 CONF_VERSION = "2"
 MACHINE_FEATURES_BACKFILL_CONSIDERED = "qemu-usermode"