Shave a stack frame off asserts.

No-one cares about seeing "async_safe_fatal" (which you have to admit is a
pretty confusing name for an app developer anyway).

On arm:

     #00 pc 0001a43c  /system/lib/libc.so (abort+63)
     #01 pc 0001a627  /system/lib/libc.so (__assert+14)

And aarch64:

     #00 pc 000000000001d75c  /system/lib64/libc.so (abort+120)
     #01 pc 000000000001dad0  /system/lib64/libc.so (__assert+44)

Bug: N/A
Test: ran `crasher assert` and `crasher64 assert`
Change-Id: I00be71c566c74cdb00f8e95d634777155bc3da03
diff --git a/libc/async_safe/async_safe_log.cpp b/libc/async_safe/async_safe_log.cpp
index 372f385..99ff0c7 100644
--- a/libc/async_safe/async_safe_log.cpp
+++ b/libc/async_safe/async_safe_log.cpp
@@ -567,10 +567,9 @@
   android_set_abort_message(msg);
 }
 
-void async_safe_fatal(const char* fmt, ...) {
+void async_safe_fatal_no_abort(const char* fmt, ...) {
   va_list args;
   va_start(args, fmt);
   async_safe_fatal_va_list(nullptr, fmt, args);
   va_end(args);
-  abort();
 }