[compiler-rt] Recurse into 'utils' directory in CMake build of compiler-rt, enable build of llvm-symbolizer binary (currently for one target only)

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@163138 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 844660f..17268c8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -103,6 +103,9 @@
 # Add the public header's directory to the includes for all of compiler-rt.
 include_directories(include)
 
+# Build utils before building compiler-rt library.
+add_subdirectory(utils)
+
 add_subdirectory(lib)
 
 if(LLVM_INCLUDE_TESTS)