Fix compilation issues with buck (#610)

* Fix compilation warning with -Wmisleading-indentation

When compile with -Wmisleading-indentation, it reports warning:
misleading indentation; statement is not part of the previous 'if'

This patch fixes it

* Avoid relative include file path

We don't need relative include file paths for src/graph/*.h
since src/ is already in CMake include_directories

src/transport/net.cc

@@ -18,7 +18,7 @@
 #include "npkit/npkit.h"
 #endif
 #include "graph.h"
-#include "../graph/topo.h"
+#include "graph/topo.h"
 
 static_assert(sizeof(ncclNetHandle_t) <= CONNECT_SIZE, "NET Connect info is too large");
 

src/transport/p2p.cc

@@ -9,7 +9,7 @@
 #include "graph.h"
 #include "utils.h"
 #include "graph.h"
-#include "../graph/topo.h"
+#include "graph/topo.h"
 
 struct ncclP2pBuff {
   void* directPtr;