Name function arguments in libc headers for Studio.

First batch of headers...

Bug: http://b/64613623
Test: builds
Change-Id: I6bc3ad79daa635456b61d03b1f43f06c433ec596
diff --git a/libc/include/android/set_abort_message.h b/libc/include/android/set_abort_message.h
index 18881a3..3dde673 100644
--- a/libc/include/android/set_abort_message.h
+++ b/libc/include/android/set_abort_message.h
@@ -33,7 +33,7 @@
 
 __BEGIN_DECLS
 
-void android_set_abort_message(const char* msg) __INTRODUCED_IN(21);
+void android_set_abort_message(const char* __msg) __INTRODUCED_IN(21);
 
 __END_DECLS