[CMake] Adding compiler-rt-test-depends target

This exposes a target for building the compiler-rt test dependencies and matches llvm-test-depends.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@280393 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 3316e00..32851b8 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -93,4 +93,5 @@
     "Running all regression tests"
     ${LLVM_LIT_TESTSUITES}
     DEPENDS ${LLVM_LIT_DEPENDS})
+  add_custom_target(compiler-rt-test-depends DEPENDS ${LLVM_LIT_DEPENDS})
 endif()