conditionalize patch for bleeding edge autoconf

check.spec

@@ -6,6 +6,8 @@ Source0:        http://downloads.sourceforge.net/check/%{name}-%{version}.tar.gz
 Group:          Development/Tools
 License:        LGPLv2+
 URL:            http://check.sourceforge.net/
+# Only needed for autotools in Fedora 21+
+Patch0:         check-0.9.11-info-in-builddir.patch
 BuildRequires:  pkgconfig, libtool, autoconf, automake
 Requires(post): info
 Requires(preun): info
@@ -45,6 +47,9 @@ programs suitable for use with the Check unit test framework.
 
 %prep
 %setup -q
+%if 0%{?fedora} >= 21
+%patch0 -p1 -b .info-in-builddir
+%endif
 autoreconf -ivf
 
 # Fix detection of various time-related function declarations