Add tags for new failing specs

Author: eregon

spec/tags/core/module/refine_tags.txt

@@ -1,2 +1,3 @@
 fails:Module#refine for methods accessed indirectly is not honored by Kernel#public_send
 fails:Module#refine for methods accessed indirectly is not honored by &
+fails:Module#refine accepts a module as argument

spec/tags/core/process/spawn_tags.txt

@@ -94,3 +94,4 @@ fails(spurious failure):Process.spawn when passed close_others: true closes file
 slow:Process.spawn inside Dir.chdir does not create extra process without chdir
 slow:Process.spawn inside Dir.chdir kills extra chdir processes
 slow:Process.spawn defaults :close_others to true
+slow:Process.spawn redirects both STDERR and STDOUT to the given file descriptor

spec/tags/core/process/wait_tags.txt

@@ -7,3 +7,4 @@ slow:Process.wait waits for a child whose process group ID is that of the callin
 slow:Process.wait doesn't block if no child is available when WNOHANG is used
 slow:Process.wait always accepts flags=0
 fails:Process.wait doesn't block if no child is available when WNOHANG is used
+slow:Process.wait returns its child pid

spec/tags/language/class_tags.txt

@@ -0,0 +1 @@
+fails:A class definition extending an object (sclass) allows accessing the block of the original scope

spec/tags/library/tempfile/initialize_tags.txt

@@ -1 +1,2 @@
 fails:Tempfile#initialize sets the permisssions on the tempfile to 0600
+fails:Tempfile#initialize sets the permissions on the tempfile to 0600

spec/tags/library/weakref/weakref_alive_tags.txt

@@ -1 +1,2 @@
 slow:WeakRef#weakref_alive? returns a falsey value if the object is no longer reachable
+slow:WeakRef#weakref_alive? returns a falsy value if the object is no longer reachable