openpower-hw-diags: add 'fmt' dependency

To assist with string formatting and replace all string streams.

Signed-off-by: Zane Shelley <zshelle@us.ibm.com>
Change-Id: Ie26333475016172e5453bbf05a7cecc405abf5d1
diff --git a/meta-openpower/recipes-phosphor/logging/openpower-hw-diags_git.bb b/meta-openpower/recipes-phosphor/logging/openpower-hw-diags_git.bb
index e94a0a4..559dd4d 100644
--- a/meta-openpower/recipes-phosphor/logging/openpower-hw-diags_git.bb
+++ b/meta-openpower/recipes-phosphor/logging/openpower-hw-diags_git.bb
@@ -24,7 +24,7 @@
 SYSTEMD_SERVICE:${PN} = "attn_handler.service"
 
 DEPENDS = "boost libgpiod pdbg phosphor-logging sdbusplus openpower-libhei \
-           nlohmann-json valijson"
+           nlohmann-json valijson fmt"
 
 # This is required so that libhei is installed with the chip data files.
 RDEPENDS:${PN} += "openpower-libhei"