Add libjson-perl to openpower-libhei_git.bb

Updated an existing perl script to now generate json output that can be
used for parsing PEL data in openpower-hw-diags.

Signed-off-by: Zane Shelley <zshelle@us.ibm.com>
Change-Id: Ied5e21ef09eb77b50fd19c40a3b7eaf1abf5d334
diff --git a/meta-openpower/recipes-phosphor/logging/openpower-libhei_git.bb b/meta-openpower/recipes-phosphor/logging/openpower-libhei_git.bb
index 6451555..cebcdc9 100644
--- a/meta-openpower/recipes-phosphor/logging/openpower-libhei_git.bb
+++ b/meta-openpower/recipes-phosphor/logging/openpower-libhei_git.bb
@@ -14,4 +14,4 @@
 
 inherit perlnative
 
-DEPENDS += "libxml2-native libxml-simple-perl-native"
+DEPENDS += "libxml2-native libxml-simple-perl-native libjson-perl-native"