Replace 'ap' with 'up' suffix in variable names. (NFC)

The `ap` suffix is a remnant of lldb's former use of auto pointers,
before they got deprecated. Although all their uses were replaced by
unique pointers, some variables still carried the suffix.

In r353795 I removed another auto_ptr remnant, namely redundant calls to
::get for unique_pointers. Jim justly noted that this is a good
opportunity to clean up the variable names as well.

I went over all the changes to ensure my find-and-replace didn't have
any undesired side-effects. I hope I didn't miss any, but if you end up
at this commit doing a git blame on a weirdly named variable, please
know that the change was unintentional.

llvm-svn: 353912
diff --git a/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp b/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
index 1969d65..74a00df 100644
--- a/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
@@ -1020,14 +1020,14 @@
     if (log)
       log->Printf("ProcessGDBRemote::%s Connecting to %s", __FUNCTION__,
                   connect_url.str().c_str());
-    std::unique_ptr<ConnectionFileDescriptor> conn_ap(
+    std::unique_ptr<ConnectionFileDescriptor> conn_up(
         new ConnectionFileDescriptor());
-    if (conn_ap) {
+    if (conn_up) {
       const uint32_t max_retry_count = 50;
       uint32_t retry_count = 0;
       while (!m_gdb_comm.IsConnected()) {
-        if (conn_ap->Connect(connect_url, &error) == eConnectionStatusSuccess) {
-          m_gdb_comm.SetConnection(conn_ap.release());
+        if (conn_up->Connect(connect_url, &error) == eConnectionStatusSuccess) {
+          m_gdb_comm.SetConnection(conn_up.release());
           break;
         } else if (error.WasInterrupted()) {
           // If we were interrupted, don't keep retrying.
@@ -4032,9 +4032,9 @@
 }
 
 DynamicLoader *ProcessGDBRemote::GetDynamicLoader() {
-  if (m_dyld_ap.get() == NULL)
-    m_dyld_ap.reset(DynamicLoader::FindPlugin(this, NULL));
-  return m_dyld_ap.get();
+  if (m_dyld_up.get() == NULL)
+    m_dyld_up.reset(DynamicLoader::FindPlugin(this, NULL));
+  return m_dyld_up.get();
 }
 
 Status ProcessGDBRemote::SendEventData(const char *data) {