Revert "[libc++] Replace uses of _LIBCPP_ALWAYS_INLINE by _LIBCPP_INLINE_VISIBILITY"

This reverts commit r336369. The commit had two problems:
1. __pbump was marked as _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY instead of
   _LIBCPP_INLINE_VISIBILITY, which lead to two symbols being added in the
   dylib and the check-cxx-abilist failing.

2. The LLDB tests started failing because they undefine
   `_LIBCPP_INLINE_VISIBILITY`. I need to figure out why they do that and
   fix the tests before we can go forward with this change.

llvm-svn: 336382
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: 195a499d638db5157a64c9c816b76154096ecd52
diff --git a/include/exception b/include/exception
index b517486..79bd6ac 100644
--- a/include/exception
+++ b/include/exception
@@ -259,7 +259,7 @@
 
 template <class _Tp, class _Up>
 struct __throw_with_nested<_Tp, _Up, true> {
-    _LIBCPP_NORETURN static inline _LIBCPP_INLINE_VISIBILITY void
+    _LIBCPP_NORETURN static inline _LIBCPP_ALWAYS_INLINE void
 #ifndef _LIBCPP_CXX03_LANG
     __do_throw(_Tp&& __t)
 #else
@@ -272,7 +272,7 @@
 
 template <class _Tp, class _Up>
 struct __throw_with_nested<_Tp, _Up, false> {
-    _LIBCPP_NORETURN static inline _LIBCPP_INLINE_VISIBILITY void
+    _LIBCPP_NORETURN static inline _LIBCPP_ALWAYS_INLINE void
 #ifndef _LIBCPP_CXX03_LANG
     __do_throw(_Tp&& __t)
 #else