Avoid using bindir macro in buildrequires

This breaks flatpak module builds when building for /app prefix, but
perl etc come from /usr.

neon.spec

@@ -3,7 +3,7 @@
 Summary: An HTTP and WebDAV client library
 Name: neon
 Version: 0.30.2
-Release: 12%{?dist}
+Release: 13%{?dist}
 License: LGPLv2+
 URL: http://www.webdav.org/neon/
 Source0: http://www.webdav.org/neon/neon-%{version}.tar.gz
@@ -17,7 +17,7 @@ BuildRequires: pkgconfig, pakchois-devel
 Requires: ca-certificates
 %if %{with tests}
 # SSL tests require openssl binary, PKCS#11 testing need certutil
-BuildRequires: %{_bindir}/perl, %{_bindir}/openssl, %{_bindir}/certutil
+BuildRequires: /usr/bin/perl, /usr/bin/openssl, /usr/bin/certutil
 %endif
 
 %description
@@ -86,6 +86,9 @@ make %{?_smp_mflags} check
 %{_libdir}/*.so
 
 %changelog
+* Mon Feb 03 2020 Kalev Lember <klember@redhat.com> - 0.30.2-13
+- Avoid using bindir macro in buildrequires
+
 * Wed Jan 29 2020 Fedora Release Engineering <releng@fedoraproject.org> - 0.30.2-12
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_32_Mass_Rebuild