Add some documentation about the arguments.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31372 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/TestRunner.sh b/test/TestRunner.sh
index 68091c2..e84f56b 100755
--- a/test/TestRunner.sh
+++ b/test/TestRunner.sh
@@ -8,6 +8,9 @@
#
# %s - Replaced with the input name of the program, or the program to
# execute, as appropriate.
+# %llvmgcc - llvm-gcc command
+# %llvmgxx - llvm-g++ command
+# %prcontext - prcontext.tcl script
#
FILENAME=$1