kbuild: allow cc-ifversion to have the argument for false condition

The macro "try-run" can have an argument for each of true and false
cases.  Having an argument for the false case of cc-ifversion (and
ld-ifversion) would be useful too.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt
index 7b3487a..a64f3c6 100644
--- a/Documentation/kbuild/makefiles.txt
+++ b/Documentation/kbuild/makefiles.txt
@@ -531,8 +531,9 @@
 	than or equal to gcc 3.0.
 
     cc-ifversion
-	cc-ifversion tests the version of $(CC) and equals last argument if
-	version expression is true.
+	cc-ifversion tests the version of $(CC) and equals the fourth parameter
+	if version expression is true, or the fifth (if given) if the version
+	expression is false.
 
 	Example:
 		#fs/reiserfs/Makefile