Fix the build with a newer LLVM.

Unify all our "noinline" variants to the current most common one, not
least because the new [[noinline]] syntax is fussier about where it goes.

Test: treehugger
Change-Id: Icfcb75c9d687f0f05c19f66ee778fd8962519436
diff --git a/debuggerd/debuggerd_test.cpp b/debuggerd/debuggerd_test.cpp
index ed90ab4..aca476f 100644
--- a/debuggerd/debuggerd_test.cpp
+++ b/debuggerd/debuggerd_test.cpp
@@ -1403,7 +1403,7 @@
   // We can't actually generate a backtrace, just make sure that the process terminates.
 }
 
-__attribute__((noinline)) extern "C" bool raise_debugger_signal(DebuggerdDumpType dump_type) {
+__attribute__((__noinline__)) extern "C" bool raise_debugger_signal(DebuggerdDumpType dump_type) {
   siginfo_t siginfo;
   siginfo.si_code = SI_QUEUE;
   siginfo.si_pid = getpid();