Switch to g_ for globals.

That's what the Google style guide recommends, and we're starting
to get a mix.

Change-Id: Ib0c53a890bb5deed5c679e887541a715faea91fc
diff --git a/libc/bionic/pthread_create.cpp b/libc/bionic/pthread_create.cpp
index f62dc15..2afb651 100644
--- a/libc/bionic/pthread_create.cpp
+++ b/libc/bionic/pthread_create.cpp
@@ -52,9 +52,9 @@
 extern "C" __LIBC_HIDDEN__ void __init_user_desc(struct user_desc*, int, void*);
 #endif
 
-static pthread_mutex_t gPthreadStackCreationLock = PTHREAD_MUTEX_INITIALIZER;
+static pthread_mutex_t g_pthread_stack_creation_ock = PTHREAD_MUTEX_INITIALIZER;
 
-static pthread_mutex_t gDebuggerNotificationLock = PTHREAD_MUTEX_INITIALIZER;
+static pthread_mutex_t g_debugger_notification_lock = PTHREAD_MUTEX_INITIALIZER;
 
 extern "C" int __isthreaded;
 
@@ -111,7 +111,7 @@
 }
 
 static void* __create_thread_stack(pthread_internal_t* thread) {
-  ScopedPthreadMutexLocker lock(&gPthreadStackCreationLock);
+  ScopedPthreadMutexLocker lock(&g_pthread_stack_creation_ock);
 
   // Create a new private anonymous map.
   int prot = PROT_READ | PROT_WRITE;
@@ -258,7 +258,7 @@
 
   // Notify any debuggers about the new thread.
   {
-    ScopedPthreadMutexLocker debugger_locker(&gDebuggerNotificationLock);
+    ScopedPthreadMutexLocker debugger_locker(&g_debugger_notification_lock);
     _thread_created_hook(thread->tid);
   }