[PATCH] kbuild: fix grammar in output Makefile .gitignore generation comment

[Im7CK]

Fixed grammar in the comment describing the generation of the output
Makefile and .gitignore file.

Signed-off-by: Mebecool1 <computergod47@xxxxxxxxx>
---
 Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 66654fa71..13236b460 100644
--- a/Makefile
+++ b/Makefile
@@ -681,8 +681,8 @@ ifdef building_out_of_srctree
 # outputmakefile generates a Makefile in the output directory, if using a
 # separate output directory. This allows convenient use of make in the
 # output directory.
-# At the same time when output Makefile generated, generate .gitignore to
-# ignore whole output directory
+# At the same time as the output Makefile is generated, generate .gitignore to
+# ignore the whole output directory.