add build dependency on gcc

libexttextcat.spec

@@ -8,6 +8,8 @@ License: BSD
 URL: https://wiki.documentfoundation.org/Libexttextcat
 Source: http://dev-www.libreoffice.org/src/libexttextcat/%{name}-%{version}.tar.xz
 
+BuildRequires: gcc
+
 Obsoletes: libtextcat < 3.2.0
 Provides: libtextcat = %{version}