[test] Add missing cmake include for building libFuzzer alone
Include CompilerRTCompile in fuzzer tests explicitly. Otherwise, when
building only libFuzzer, CMake fails due to:
CMake Error at cmake/Modules/AddCompilerRT.cmake:395 (sanitizer_test_compile):
Unknown CMake command "sanitizer_test_compile".
Call Stack (most recent call first):
lib/fuzzer/tests/CMakeLists.txt:53 (generate_compiler_rt_tests)
Differential Revision: https://reviews.llvm.org/D55378
diff --git a/compiler-rt/lib/fuzzer/tests/CMakeLists.txt b/compiler-rt/lib/fuzzer/tests/CMakeLists.txt
index 2a29348..6abb72d 100644
--- a/compiler-rt/lib/fuzzer/tests/CMakeLists.txt
+++ b/compiler-rt/lib/fuzzer/tests/CMakeLists.txt
@@ -1,3 +1,5 @@
+include(CompilerRTCompile)
+
set(LIBFUZZER_UNITTEST_CFLAGS
${COMPILER_RT_UNITTEST_CFLAGS}
${COMPILER_RT_GTEST_CFLAGS}
