get rid of gnu_cxx namespace and troublesome ErrorString function

Giving weird compilation errors. We don't need it any way.

Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
diff --git a/src/sattypes.h b/src/sattypes.h
index 96bf13b..258cfc2 100644
--- a/src/sattypes.h
+++ b/src/sattypes.h
@@ -28,7 +28,7 @@
 #ifdef HAVE_CONFIG_H  // Built using autoconf
 #include "stressapptest_config.h"
 using namespace std;
-using namespace __gnu_cxx;
+//using namespace __gnu_cxx;
 
 typedef signed long long   int64;
 typedef signed int         int32;
@@ -166,6 +166,7 @@
   return nanosleep(&req, NULL) == 0;
 }
 
+#if 0
 // Get an error code description for use in error messages.
 //
 // Args:
@@ -174,6 +175,7 @@
   char buf[256];
   return string(strerror_r(error_num, buf, sizeof buf));
 }
+#endif
 
 // Define handy constants here
 static const int kTicksPerSec = 100;