Log host architecture at start-up (#2135)

Author: robbycochran

collector/collector.cpp

@@ -143,6 +143,7 @@ int main(int argc, char** argv) {
   CLOG(INFO) << "Collector Version: " << GetCollectorVersion();
   CLOG(INFO) << "OS: " << host_info.GetDistro();
   CLOG(INFO) << "Kernel Version: " << host_info.GetKernelVersion().GetRelease();
+  CLOG(INFO) << "Architecture: " << host_info.GetKernelVersion().GetMachine();
 
   initialChecks();
 

collector/lib/HostInfo.h

@@ -117,6 +117,11 @@ struct KernelVersion {
     return release;
   }
 
+  // Same output as calling `uname -m` in the shell
+  const std::string& GetMachine() {
+    return machine;
+  }
+
   // the kernel version
   int kernel;
   // the kernel major version