build: fix -Wmissing-prototype

This helps make the author's original intent clear.  Tested by building
and running the unit tests with clang.

Change-Id: If0231ec5634adad0b61e7fcff8ec1e5bcbbb92c1
Signed-off-by: Brad Bishop <bradbish@qti.qualcomm.com>
diff --git a/src/test/util/debug_output.hpp b/src/test/util/debug_output.hpp
index aff87d5..0532d55 100644
--- a/src/test/util/debug_output.hpp
+++ b/src/test/util/debug_output.hpp
@@ -4,7 +4,7 @@
 
 // Some debug functions for dumping out the main data structures in objmgr
 
-void dumpAssociationOwnersType(AssociationOwnersType& assocOwners)
+inline void dumpAssociationOwnersType(AssociationOwnersType& assocOwners)
 {
     using namespace std;
     cout << "##### AssociationOwnersType #####\n";
@@ -31,7 +31,7 @@
     }
 }
 
-void dumpAssociationInterfaces(AssociationInterfaces& assocInterfaces)
+inline void dumpAssociationInterfaces(AssociationInterfaces& assocInterfaces)
 {
     using namespace std;
     cout << "##### AssociationInterfaces #####\n";
@@ -49,7 +49,7 @@
     }
 }
 
-void dumpInterfaceMapType(InterfaceMapType& intfMap)
+inline void dumpInterfaceMapType(InterfaceMapType& intfMap)
 {
     using namespace std;
     cout << "##### interfaceMapType #####\n";