Fix path in phosphor-snmp recipe

All our other recipes point to ${S} when referring to the license.  This
should as well.

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: Ia47394e91955586da42b7829a6c6c052f4c7073d
diff --git a/meta-phosphor/recipes-phosphor/network/phosphor-snmp_git.bb b/meta-phosphor/recipes-phosphor/network/phosphor-snmp_git.bb
index 2c4e4af..2d2fe97 100644
--- a/meta-phosphor/recipes-phosphor/network/phosphor-snmp_git.bb
+++ b/meta-phosphor/recipes-phosphor/network/phosphor-snmp_git.bb
@@ -9,7 +9,7 @@
 inherit obmc-phosphor-dbus-service
 
 LICENSE = "Apache-2.0"
-LIC_FILES_CHKSUM = "file://${WORKDIR}/git/LICENSE;md5=86d3f3a95c324c9479bd8986968f4327"
+LIC_FILES_CHKSUM = "file://${S}/LICENSE;md5=86d3f3a95c324c9479bd8986968f4327"
 
 SRC_URI += "git://github.com/openbmc/phosphor-snmp;branch=master;protocol=https"
 SRCREV = "34d129a95281dd93ebf88f901895bc89c32b0bcd"