Update update_web_docs_svn references in sourcebuild.texi.

These needed updating after the replacement of update_web_docs_svn by
update_web_docs_git.

	* doc/sourcebuild.texi (Texinfo Manuals, Front End): Refer to
	update_web_docs_git instead of update_web_docs_svn.

gcc/ChangeLog

+2020-01-22  Joseph Myers  <joseph@codesourcery.com>
+
+	* doc/sourcebuild.texi (Texinfo Manuals, Front End): Refer to
+	update_web_docs_git instead of update_web_docs_svn.
+
 2020-01-21  Andrew Pinski  <apinski@marvell.com>
 
 	PR target/9311

gcc/doc/sourcebuild.texi

@@ -388,7 +388,7 @@ and they are included in release distributions.
 
 Manuals are also provided on the GCC web site, in both HTML and
 PostScript forms.  This is done via the script
-@file{maintainer-scripts/update_web_docs_svn}.  Each manual to be
+@file{maintainer-scripts/update_web_docs_git}.  Each manual to be
 provided online must be listed in the definition of @code{MANUALS} in
 that file; a file @file{@var{name}.texi} must only appear once in the
 source tree, and the output manual must have the same name as the
@@ -561,7 +561,7 @@ A news item on @file{index.html}, and possibly an announcement on the
 @email{gcc-announce@@gcc.gnu.org} mailing list.
 @item
 The front end's manuals should be mentioned in
-@file{maintainer-scripts/update_web_docs_svn} (@pxref{Texinfo Manuals})
+@file{maintainer-scripts/update_web_docs_git} (@pxref{Texinfo Manuals})
 and the online manuals should be linked to from
 @file{onlinedocs/index.html}.
 @item