phosphor-debugtools: add sensors command

lmsensors contains the 'sensors' command, the standard method for
reading hwmon nodes and reporting information.

Change-Id: I2a3f3a925d06cd22b12f33f2e4090ecaf2cca44a
Signed-off-by: Joel Stanley <joel@jms.id.au>
diff --git a/common/recipes-phosphor/packagegroups/packagegroup-obmc-phosphor-debugtools.bb b/common/recipes-phosphor/packagegroups/packagegroup-obmc-phosphor-debugtools.bb
index fa274a9..47f1e46 100644
--- a/common/recipes-phosphor/packagegroups/packagegroup-obmc-phosphor-debugtools.bb
+++ b/common/recipes-phosphor/packagegroups/packagegroup-obmc-phosphor-debugtools.bb
@@ -10,4 +10,5 @@
     ethtool \
     net-tools \
     phosphor-logging-test \
+    lmsensors-sensors \
     "