!9 remove unnecessary BuildRequires git, add necessary BuildRequires automake

From: @chenyanpanHW
Reviewed-by: @xiezhipeng1
Signed-off-by: @xiezhipeng1

grep.spec

@@ -1,6 +1,6 @@
 Name:    grep
 Version: 3.6
-Release: 2
+Release: 3
 Summary: A string search utility
 License: GPLv3+
 URL: http://www.gnu.org/software/grep/
@@ -8,7 +8,7 @@ Source0: https://ftp.gnu.org/gnu/grep/grep-%{version}.tar.xz
 
 Patch0: grep-3.6-gnulib-c-stack-fix.patch
 
-BuildRequires: gcc git pcre-devel >= 3.9-10 texinfo gettext libsigsegv-devel
+BuildRequires: gcc pcre-devel >= 3.9-10 texinfo gettext libsigsegv-devel automake
 Provides: /bin/egrep /bin/fgrep /bin/grep bundled(gnulib)
 
 %description
@@ -46,6 +46,9 @@ make check
 
 
 %changelog
+* Fri Aug 20 2021 chenyanpanHW <chenyanpan@huawei.com> - 3.6-3
+- DESC: remove unnecessary BuildRequires git, add necessary BuildRequires automake
+
 * Tue Aug 10 2021 yangzhuangzhuang<yangzhuangzhuang1@huawei.com> - 3.6-2
 - Type:bugfix
 - ID:NA