Rename debug_stacktrace to debug_backtrace.

All the functions say "backtrace", so it's weird that the filename
says "stacktrace".

Change-Id: I1c88a56c1f9adb1bae4615edc8af3e73db270a8c
diff --git a/libc/Android.mk b/libc/Android.mk
index d6b208c..4b98ee7 100644
--- a/libc/Android.mk
+++ b/libc/Android.mk
@@ -1428,8 +1428,8 @@
     $(libc_common_c_includes) \
 
 LOCAL_SRC_FILES := \
+    bionic/debug_backtrace.cpp \
     bionic/debug_mapinfo.cpp \
-    bionic/debug_stacktrace.cpp \
     bionic/libc_logging.cpp \
     bionic/malloc_debug_leak.cpp \
     bionic/malloc_debug_check.cpp \
diff --git a/libc/bionic/debug_stacktrace.cpp b/libc/bionic/debug_backtrace.cpp
similarity index 99%
rename from libc/bionic/debug_stacktrace.cpp
rename to libc/bionic/debug_backtrace.cpp
index b49a42e..de3ce08 100644
--- a/libc/bionic/debug_stacktrace.cpp
+++ b/libc/bionic/debug_backtrace.cpp
@@ -26,7 +26,7 @@
  * SUCH DAMAGE.
  */
 
-#include "debug_stacktrace.h"
+#include "debug_backtrace.h"
 
 #include <dlfcn.h>
 #include <inttypes.h>
diff --git a/libc/bionic/debug_stacktrace.h b/libc/bionic/debug_backtrace.h
similarity index 94%
rename from libc/bionic/debug_stacktrace.h
rename to libc/bionic/debug_backtrace.h
index 2cf8636..adc9d1d 100644
--- a/libc/bionic/debug_stacktrace.h
+++ b/libc/bionic/debug_backtrace.h
@@ -26,8 +26,8 @@
  * SUCH DAMAGE.
  */
 
-#ifndef DEBUG_STACKTRACE_H
-#define DEBUG_STACKTRACE_H
+#ifndef DEBUG_BACKTRACE_H
+#define DEBUG_BACKTRACE_H
 
 #include <stdint.h>
 #include <sys/cdefs.h>
@@ -37,4 +37,4 @@
 __LIBC_HIDDEN__ int get_backtrace(uintptr_t* stack_frames, size_t max_depth);
 __LIBC_HIDDEN__ void log_backtrace(uintptr_t* stack_frames, size_t frame_count);
 
-#endif /* DEBUG_STACKTRACE_H */
+#endif /* DEBUG_BACKTRACE_H */
diff --git a/libc/bionic/malloc_debug_check.cpp b/libc/bionic/malloc_debug_check.cpp
index dee03fa..07186ce 100644
--- a/libc/bionic/malloc_debug_check.cpp
+++ b/libc/bionic/malloc_debug_check.cpp
@@ -47,7 +47,7 @@
 #include <unwind.h>
 
 #include "debug_mapinfo.h"
-#include "debug_stacktrace.h"
+#include "debug_backtrace.h"
 #include "malloc_debug_backtrace.h"
 #include "malloc_debug_common.h"
 #include "malloc_debug_disable.h"
diff --git a/libc/bionic/malloc_debug_leak.cpp b/libc/bionic/malloc_debug_leak.cpp
index 6a46667..1ffbee2 100644
--- a/libc/bionic/malloc_debug_leak.cpp
+++ b/libc/bionic/malloc_debug_leak.cpp
@@ -46,7 +46,7 @@
 #include <unistd.h>
 #include <unwind.h>
 
-#include "debug_stacktrace.h"
+#include "debug_backtrace.h"
 #include "malloc_debug_backtrace.h"
 #include "malloc_debug_common.h"
 #include "malloc_debug_disable.h"