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/minidump/ProcessMinidump.cpp b/lldb/source/Plugins/Process/minidump/ProcessMinidump.cpp
index 91075cc..c702d84 100644
--- a/lldb/source/Plugins/Process/minidump/ProcessMinidump.cpp
+++ b/lldb/source/Plugins/Process/minidump/ProcessMinidump.cpp
@@ -409,10 +409,10 @@
 // try to set up symbolic breakpoints, which in turn may force loading more
 // debug information than needed.
 JITLoaderList &ProcessMinidump::GetJITLoaders() {
-  if (!m_jit_loaders_ap) {
-    m_jit_loaders_ap = llvm::make_unique<JITLoaderList>();
+  if (!m_jit_loaders_up) {
+    m_jit_loaders_up = llvm::make_unique<JITLoaderList>();
   }
-  return *m_jit_loaders_ap;
+  return *m_jit_loaders_up;
 }
 
 #define INIT_BOOL(VAR, LONG, SHORT, DESC) \