Move #pragma weak g_client after declaration

Move the pragma weak after the declaration in an attempt to improve
compatibility.

Author: dpfrey

erpc_c/setup/erpc_arbitrated_client_setup.cpp

@@ -32,8 +32,8 @@ using namespace erpc;
 
 // global client variables
 static ManuallyConstructed<ArbitratedClientManager> s_client;
-#pragma weak g_client
 ClientManager *g_client;
+#pragma weak g_client
 
 static ManuallyConstructed<BasicCodecFactory> s_codecFactory;
 static ManuallyConstructed<TransportArbitrator> s_arbitrator;

erpc_c/setup/erpc_client_setup.cpp

@@ -30,8 +30,8 @@ using namespace erpc;
 
 // global client variables
 static ManuallyConstructed<ClientManager> s_client;
-#pragma weak g_client
 ClientManager *g_client;
+#pragma weak g_client
 static ManuallyConstructed<BasicCodecFactory> s_codecFactory;
 static ManuallyConstructed<Crc16> s_crc16;