Add missing build-requires on GCC

Packages that are built with GCC must BuildRequire it.
See: https://fedoraproject.org/wiki/Packaging:C_and_C%2B%2B#BuildRequires_and_Requires

antlr.spec

@@ -4,7 +4,7 @@
 Summary:       ANother Tool for Language Recognition
 Name:          antlr
 Version:       2.7.7
-Release:       43%{?dist}
+Release:       44%{?dist}
 Epoch:         0
 License:       Public Domain
 URL:           http://www.antlr2.org/
@@ -22,6 +22,8 @@ BuildRequires: mono-core
 BuildRequires: mono-winforms
 %endif
 %endif
+BuildRequires: gcc-c++
+BuildRequires: make
 BuildRequires: ant
 BuildRequires: java-devel >= 1:1.7.0
 BuildRequires: java-javadoc
@@ -176,6 +178,9 @@ cd ../..
 %{python2_sitelib}/antlr-*
 
 %changelog
+* Tue Jan 31 2017 Mikolaj Izdebski <mizdebsk@redhat.com> - 0:2.7.7-44
+- Add missing build-requires on GCC
+
 * Tue Jul 19 2016 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 0:2.7.7-43
 - https://fedoraproject.org/wiki/Changes/Automatic_Provides_for_Python_RPM_Packages