lldb_rp: reload debug info if not loaded yet [ci skip]

As debug infos in shared libraries are not accessible until loaded,
retry loading the infos when needed.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64901 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

misc/lldb_cruby.py

@@ -56,6 +56,9 @@ def flonum_p(x):
     return (x&RUBY_FLONUM_MASK) == RUBY_FLONUM_FLAG
 
 def lldb_rp(debugger, command, result, internal_dict):
+    if not ('RUBY_Qfalse' in globals()):
+        lldb_init(debugger)
+
     target = debugger.GetSelectedTarget()
     process = target.GetProcess()
     thread = process.GetSelectedThread()