[gn] port 7dc7c15

Author: nico

llvm/utils/gn/secondary/lldb/test/BUILD.gn

@@ -1,5 +1,6 @@
 import("//llvm/triples.gni")
 
+import("//llvm/utils/gn/build/buildflags.gni")
 #import("//llvm/utils/gn/build/libs/xar/enable.gni")
 import("//llvm/utils/gn/build/libs/xml/enable.gni")
 import("//llvm/utils/gn/build/libs/zlib/enable.gni")
@@ -93,6 +94,12 @@ write_lit_cfg("lit_api_site_cfg") {
     "HOST_OS=$host_os",  # XXX
   ]
 
+  if (is_debug) {
+    extra_values += [ "CMAKE_BUILD_TYPE=Debug" ]
+  } else {
+    extra_values += [ "CMAKE_BUILD_TYPE=Releas" ]
+  }
+
   dir = get_path_info(output, "dir")
   if (host_os == "win") {
     # See comment for Windows solink in llvm/utils/gn/build/toolchain/BUILD.gn