Create an UnwindMapLocal object.

The way libunwind handles local unwinds is different from remote unwinds,
so create a new map object to handle the differences.

Add new test to verify the map data is being generated correctly.

Add new tests to check for leaks.

Refactor the BACK_LOGW code into a single header file.

Change-Id: I01f3cbfc4b927646174ea1b614fa25d23b9b3427
diff --git a/libbacktrace/Corkscrew.cpp b/libbacktrace/Corkscrew.cpp
index efeee2e..773b0a2 100644
--- a/libbacktrace/Corkscrew.cpp
+++ b/libbacktrace/Corkscrew.cpp
@@ -14,8 +14,6 @@
  * limitations under the License.
  */
 
-#define LOG_TAG "libbacktrace"
-
 #include <backtrace/Backtrace.h>
 
 #include <string.h>
@@ -28,6 +26,7 @@
 #endif
 #include <dlfcn.h>
 
+#include "BacktraceLog.h"
 #include "Corkscrew.h"
 
 //-------------------------------------------------------------------------