add missing BuildRequires: gcc

Signed-off-by: Igor Gnatenko <ignatenkobrain@fedoraproject.org>

python-coverage.spec

@@ -14,6 +14,8 @@ License:        ASL 2.0 and MIT and (MIT or GPL)
 URL:            http://nedbatchelder.com/code/modules/coverage.html
 Source0:        http://pypi.python.org/packages/source/c/coverage/coverage-%{version}%{?prever}.tar.gz
 
+BuildRequires:  gcc
+
 %description
 Coverage.py is a Python module that measures code coverage during Python 
 execution. It uses the code analysis tools and tracing hooks provided in the