host-ipmid-fru: CPPFLAGS -> CXXFLAGS

Change-Id: I33e9833aedcb65b31237414204f73237166eeb60
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/meta-phosphor/common/recipes-phosphor/host-ipmid/host-ipmid-fru.bb b/meta-phosphor/common/recipes-phosphor/host-ipmid/host-ipmid-fru.bb
index 6e5106f..c5c4328 100644
--- a/meta-phosphor/common/recipes-phosphor/host-ipmid/host-ipmid-fru.bb
+++ b/meta-phosphor/common/recipes-phosphor/host-ipmid/host-ipmid-fru.bb
@@ -14,7 +14,7 @@
 
 RDEPENDS_${PN} += "libsystemd"
 
-TARGET_CPPFLAGS += " -fpic -std=gnu++14"
+TARGET_CXXFLAGS += " -fpic -std=gnu++14"
 TARGET_CFLAGS += " -fpic"
 
 SRC_URI += "git://github.com/openbmc/ipmi-fru-parser"