!9 remove BuildRequires gdb

From: @xinyingchao
Reviewed-by: @overweight
Signed-off-by: @overweight

libtar.spec

@@ -1,6 +1,6 @@
 Name:           libtar
 Version:        1.2.20
-Release:        18
+Release:        19
 Summary:        Library for manipulating tar files from within C programs.
 License:        BSD
 URL:            http://repo.or.cz/libtar.git
@@ -12,7 +12,7 @@ Patch2:         libtar-1.2.20-fix-resource-leaks.patch
 Patch3:         libtar-1.2.11-bz729009.patch
 Patch4:         libtar-1.2.20-no-static-buffer.patch
 Patch5:         CVE-2013-4420.patch
-BuildRequires:  libtool git gdb
+BuildRequires:  libtool git 
 
 %description
 Libtar is a C library for manipulating POSIX tar files. It handles adding
@@ -69,6 +69,9 @@ rm $RPM_BUILD_ROOT%{_libdir}/*.la
 %{_mandir}/man3/*.3*
 
 %changelog
+* Fri Jul 27 2021 yuanxin <yuanxin24@huawei.com> - 1.2.20-19
+- remove BuildRequires gdb
+
 * Mon Sep 14 2020 shixuantong <shixuantong@huawei.com> - 1.2.20-18
 - fix CVE-2013-4420