merge revision(s) cbe4f75e: [Backport
	 #16834]

		Fix rb_profile_frame_classpath to handle module singletons

		Right now `SomeClass.method` is properly named, but `SomeModule.method`
		is displayed as `#<Module:0x000055eb5d95adc8>.method` which makes
		profiling annoying.
	---
	 test/-ext-/debug/test_profile_frames.rb | 40 ++++++++++++++++++++++++++++-----
	 version.h                               |  2 +-
	 vm_backtrace.c                          |  2 +-
	 3 files changed, 36 insertions(+), 8 deletions(-)

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_6@67918 b2dd03c8-39d4-4d8f-98ff-823fe69b080e