[svn-r18773] Add files to support building library with CMake

Tested: Local linux

tools/h5diff/testfiles/h5diff_102w.txt

@@ -0,0 +1,10 @@
+dataset: </g1/fp1> and </g1/fp2>
+size:           [3x2]           [3x2]
+position        fp1             fp2             difference          
+------------------------------------------------------------
+[ 0 1 ]          1e-005          2e-005          1e-005         
+[ 1 0 ]          1e-005          9e-006          9.99999e-007   
+[ 1 1 ]          0               1e-005          1e-005         
+[ 2 0 ]          1e-005          0               1e-005         
+4 differences found
+EXIT CODE: 1