[pushed] Fix comment in dwarf2/attribute.h

[Tom Tromey]

I noticed that a comment in dwarf2/attribute.h still referred to
dwarf2_get_attr_constant_value.  However, this is now a method on
struct attribute.

gdb/ChangeLog
2020-03-28  Tom Tromey  <tom@tromey.com>

	* dwarf2/attribute.h (struct attribute) <form_is_constant>: Update
	comment.
---
 gdb/ChangeLog          | 5 +++++
 gdb/dwarf2/attribute.h | 6 +++---
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/gdb/dwarf2/attribute.h b/gdb/dwarf2/attribute.h
index 483b805433b..69b33513ad6 100644
--- a/gdb/dwarf2/attribute.h
+++ b/gdb/dwarf2/attribute.h
@@ -59,7 +59,7 @@ struct attribute
 
   /* Return non-zero if ATTR's value falls in the 'constant' class, or
      zero otherwise.  When this function returns true, you can apply
-     dwarf2_get_attr_constant_value to it.
+     the constant_value method to it.
 
      However, note that for some attributes you must check
      attr_form_is_section_offset before using this test.  DW_FORM_data4
@@ -70,8 +70,8 @@ struct attribute
      section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
      taken as section offsets, not constants.
 
-     DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value
-     cannot handle that.  */
+     DW_FORM_data16 is not considered as constant_value cannot handle
+     that.  */
 
   bool form_is_constant () const;
 
-- 
2.17.2