Add some notes on the MultiSource/Examples dir.

git-svn-id: https://llvm.org/svn/llvm-project/test-suite/trunk@111458 91177308-0d34-0410-b5e6-96231b3b80d8

Author: ddunbar

MultiSource/Examples/MultipleResults/README.txt

@@ -0,0 +1,16 @@
+This example shows how to generate multiple numeric results from a single tests.
+
+The test is expected to create an output file:
+  Output/FOO.extra-results.txt
+where FOO is the tests' name.
+
+The format of the file should be one result per line, with each line in the
+form:
+--
+Result-SomeName: NNN.NNN
+--
+where SomeName is the name that will be given to the pseudo-test created for the
+result, and NNN.NNN is the value for the result.
+
+There is currently no support for assocating a pass/fail indicator with subtest
+results.

MultiSource/Examples/README.txt

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+This directory contains examples of how programs can be integrated into the LLVM
+test-suite infrastructure.