Reorganize directories (#3462)

* 🚚 move files
* 🚚 rename doc folder to docs
* 🚚 rename test folder to tests

tests/thirdparty/Fuzzer/test/unit/lit.cfg

@@ -0,0 +1,7 @@
+import lit.formats
+
+config.name = "LLVMFuzzer-Unittest"
+print config.test_exec_root
+config.test_format = lit.formats.GoogleTest(".", "Unittest")
+config.suffixes = []
+config.test_source_root = config.test_exec_root

tests/thirdparty/Fuzzer/test/unit/lit.site.cfg.in

@@ -0,0 +1,2 @@
+config.test_exec_root = "@CMAKE_CURRENT_BINARY_DIR@"
+lit_config.load_config(config, "@CMAKE_CURRENT_SOURCE_DIR@/unit/lit.cfg")