Increase maximum wait time to find the target control port after launch

* Sometimes a process can take a while to start, this change waits up
  to 1+2+4+8+16+32+64 = 127 ms which is still not that much.
* Also log a message if we still can't find it, so it's clear what the
  problem was.

renderdoc/os/posix/linux/linux_process.cpp

@@ -28,7 +28,7 @@
 extern char **environ;
 
 #define INITIAL_WAIT_TIME 1000
-#define MAX_WAIT_TIME 63000
+#define MAX_WAIT_TIME 64000
 
 char **GetCurrentEnvironment()
 {
@@ -45,7 +45,7 @@ int GetIdentPort(pid_t childPid)
   int totalWaitTime = 0;
 
   // try for a little while for the /proc entry to appear
-  while(totalWaitTime < MAX_WAIT_TIME)
+  while(totalWaitTime <= MAX_WAIT_TIME)
   {
     // back-off for each retry
     usleep(waitTime);
@@ -84,6 +84,13 @@ int GetIdentPort(pid_t childPid)
     FileIO::fclose(f);
   }
 
+  if(ret == 0)
+  {
+    RDCWARN("Couldn't locate renderdoc target control listening port between %u and %u in %s",
+            (uint32_t)RenderDoc_FirstTargetControlPort, (uint32_t)RenderDoc_LastTargetControlPort,
+            procfile.c_str());
+  }
+
   return ret;
 }