lanl/platform: fixes to pick up lustre

Fixes to lanl platform files to pick up lustre header
files, etc. for romio and ompi i/o.

Fixes #1033

Thanks to Jerome Vienne for spotting this.

Signed-off-by: Howard Pritchard <howardp@lanl.gov>

contrib/platform/lanl/cray_xc_cle5.2/optimized-lustre

@@ -14,4 +14,7 @@ else
 fi
 
 # enable and Lustre in romio
-with_io_romio_flags="--with-file-system=ufs+nfs+lustre CFLAGS=-I/opt/cray/lustre-cray_gem_s/default/include"
+with_io_romio_flags="--with-file-system=ufs+nfs+lustre CFLAGS=-I/opt/cray/lustre-cray_ari_s/default/include"
+
+# enable Lustre in OMPI I/O
+with_lustre=/opt/cray/lustre-cray_ari_s/default