Use LIBS instead of LDFLAGS for -ltirpc

hdf.spec

@@ -4,7 +4,7 @@
 
 Name: hdf
 Version: 4.2.13
-Release: 10%{?dist}
+Release: 11%{?dist}
 Summary: A general purpose library and file format for storing scientific data
 License: BSD
 Group: System Environment/Libraries
@@ -87,7 +87,7 @@ rm config/*linux-gnu
 # Shared libraries disabled: libmfhdf.so is not correctly compiled
 # for missing link to libdf.so
 export CFLAGS="%{optflags} -fPIC -I%{_includedir}/tirpc"
-export LDFLAGS="%{__global_ldflags} -ltirpc"
+export LIBS="-ltirpc"
 export FFLAGS="%{optflags} -fPIC -ffixed-line-length-none"
 %configure --disable-production --disable-java --disable-netcdf \
  --enable-shared=no --enable-static=yes --enable-fortran %{!?el6:--with-szlib} \
@@ -150,6 +150,9 @@ make -j1 check
 %{_defaultdocdir}/%{name}/examples
 
 %changelog
+* Sun Oct 7 2018 Orion Poplawski <orion@nwra.com> - 4.2.13-11
+- Use LIBS instead of LDFLAGS for -ltirpc
+
 * Fri Jul 13 2018 Fedora Release Engineering <releng@fedoraproject.org> - 4.2.13-10
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_29_Mass_Rebuild