doc: Prepend 'build/' to binary paths under 'src/' in docs

contrib/tracing/README.md

@@ -82,7 +82,7 @@ about the connection. Peers can be selected individually to view recent P2P
 messages.
 
 ```
-$ python3 contrib/tracing/p2p_monitor.py ./src/bitcoind
+$ python3 contrib/tracing/p2p_monitor.py ./build/src/bitcoind
 ```
 
 Lists selectable peers and traffic and connection information.
@@ -150,7 +150,7 @@ lost. BCC prints: `Possibly lost 2 samples` on lost messages.
 
 
 ```
-$ python3 contrib/tracing/log_raw_p2p_msgs.py ./src/bitcoind
+$ python3 contrib/tracing/log_raw_p2p_msgs.py ./build/src/bitcoind
 ```
 
 ```
@@ -188,7 +188,7 @@ In a different terminal, starting Bitcoin Core in SigNet mode and with
 re-indexing enabled.
 
 ```
-$ ./src/bitcoind -signet -reindex
+$ ./build/src/bitcoind -signet -reindex
 ```
 
 This produces the following output.
@@ -241,7 +241,7 @@ A BCC Python script to log the UTXO cache flushes. Based on the
 `utxocache:flush` tracepoint.
 
 ```bash
-$ python3 contrib/tracing/log_utxocache_flush.py ./src/bitcoind
+$ python3 contrib/tracing/log_utxocache_flush.py ./build/src/bitcoind
 ```
 
 ```
@@ -300,7 +300,7 @@ comprising a timestamp along with all event data available via the event's
 tracepoint.
 
 ```console
-$ python3 contrib/tracing/mempool_monitor.py ./src/bitcoind
+$ python3 contrib/tracing/mempool_monitor.py ./build/src/bitcoind
 ```
 
 ```