[llvm-cov] Add split-file to compiler-rt test requirements.

Differential Revision: https://reviews.llvm.org/D136702

(cherry picked from commit 0eb01a9)

Author: mysterymath

compiler-rt/test/CMakeLists.txt

@@ -32,7 +32,7 @@ if(NOT ANDROID)
     # Use LLVM utils and Clang from the same build tree.
     list(APPEND SANITIZER_COMMON_LIT_TEST_DEPS
       clang clang-resource-headers FileCheck count not llvm-config llvm-nm llvm-objdump
-      llvm-readelf llvm-readobj llvm-size llvm-symbolizer compiler-rt-headers sancov)
+      llvm-readelf llvm-readobj llvm-size llvm-symbolizer compiler-rt-headers sancov split-file)
     if (WIN32)
       list(APPEND SANITIZER_COMMON_LIT_TEST_DEPS KillTheDoctor)
     endif()