[doc] Update definition location of attribute_spec in documentation

	* target.def (attribute_table): Mention that struct attribute_spec
	is defined in tree-core.h rather than tree.h
	* doc/tm.texi: Regenerate.

From-SVN: r222688

gcc/ChangeLog

+2015-05-01  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
+
+	* target.def (attribute_table): Mention that struct attribute_spec
+	is defined in tree-core.h rather than tree.h
+	* doc/tm.texi: Regenerate.
+
 2015-05-01  Richard Sandiford  <richard.sandiford@arm.com>
 
 	* genrecog.c (test): Rename to rtx_test.  Update rest of file

gcc/doc/tm.texi

@@ -9817,7 +9817,7 @@ be documented in @file{extend.texi}.
 
 @deftypevr {Target Hook} {const struct attribute_spec *} TARGET_ATTRIBUTE_TABLE
 If defined, this target hook points to an array of @samp{struct
-attribute_spec} (defined in @file{tree.h}) specifying the machine
+attribute_spec} (defined in @file{tree-core.h}) specifying the machine
 specific attributes for this target and some of the restrictions on the
 entities to which these attributes are applied and the arguments they
 take.

gcc/target.def

@@ -1975,7 +1975,7 @@ merging.",
 DEFHOOKPOD
 (attribute_table,
  "If defined, this target hook points to an array of @samp{struct\n\
-attribute_spec} (defined in @file{tree.h}) specifying the machine\n\
+attribute_spec} (defined in @file{tree-core.h}) specifying the machine\n\
 specific attributes for this target and some of the restrictions on the\n\
 entities to which these attributes are applied and the arguments they\n\
 take.",