[RISCV] Disable test/Analysis/CostModel/RISCV tests if RISCV backend not built

Adds missing lit.local.cfg. Fixes rL362691.

llvm-svn: 362693

diff --git a/llvm/test/Analysis/CostModel/RISCV/lit.local.cfg b/llvm/test/Analysis/CostModel/RISCV/lit.local.cfg
new file mode 100644 (file)
index 0000000..d0b081e
--- /dev/null
+++ b/llvm/test/Analysis/CostModel/RISCV/lit.local.cfg
@@ -0,0 +1,3 @@
+if not 'RISCV' in config.root.targets:
+    config.unsupported = True
+