AI 145059: (Almost) final set of wrapper around the C headers for stdc++ and their tests.
  The only one left is cstring.
  * bionic/libstdc++/include/cstdlib:
  * bionic/libstdc++/include/cstdio:
  * bionic/libstdc++/include/cstdint:
  * bionic/libstdc++/include/csignal:
  * bionic/libstdc++/include/csetjmp:
  Added header file.
  Checks the bionic headers file were picked up instead of the host ones.
  Added test for new header files
  * system/extras/tests/bionic/libstdc++/Android.mk:
  Added tests for the new header files.
  EXTRA_CFLAGS: include the bionic header files.
  BUG=1601432

Automated import of CL 145059
diff --git a/libstdc++/include/cassert b/libstdc++/include/cassert
index 38b518d..5753e34 100644
--- a/libstdc++/include/cassert
+++ b/libstdc++/include/cassert
@@ -32,4 +32,8 @@
  * can be included multiple times with different definition of NDEBUG, hence the
  * absence of include guards.
  */
+
+#ifndef BIONIC_LIBSTDCPP_INCLUDE_CASSERT__
+#define BIONIC_LIBSTDCPP_INCLUDE_CASSERT__
+#endif
 #include <assert.h>