Add TARGET_FLOSS define

OS_GENERIC is used for host tests and Linux builds but it unfortunately
puts everything at the current working directory. Add a TARGET_FLOSS
define so that we can put them at absolute locations (i.e.
/etc/bluetooth).

Bug: 186442862
Tag: #floss
Test: atest --host bluetooth_test_gd
Change-Id: I1c9aaacd1b36b80523437b050d2232b7e5bba47c

BUILD.gn

@@ -112,6 +112,8 @@ config("target_defaults") {
     "HAS_NO_BDROID_BUILDCFG",
     "OS_GENERIC",
     "OS_LINUX_GENERIC",
+    "TARGET_FLOSS",
+    "USE_LINUX_HCI_SOCKET",
     "EXPORT_SYMBOL=__attribute__((visibility(\"default\")))",
     "FALLTHROUGH_INTENDED=[[clang::fallthrough]]",
   ]

system/btif/src/btif_core.cc

@@ -69,7 +69,7 @@ static void bt_jni_msg_ready(void* context);
 
 #ifndef BTE_DID_CONF_FILE
 // TODO(armansito): Find a better way than searching by a hardcoded path.
-#if defined(OS_GENERIC)
+#if defined(OS_GENERIC) && !defined(TARGET_FLOSS)
 #define BTE_DID_CONF_FILE "bt_did.conf"
 #else  // !defined(OS_GENERIC)
 #define BTE_DID_CONF_FILE "/etc/bluetooth/bt_did.conf"

system/gd/os/linux/parameter_provider.cc

@@ -42,7 +42,7 @@ std::string ParameterProvider::ConfigFilePath() {
       return config_file_path;
     }
   }
-  return "/etc/systembt/bt_config.conf";
+  return "/etc/bluetooth/bt_config.conf";
 }
 
 void ParameterProvider::OverrideConfigFilePath(const std::string& path) {
@@ -58,7 +58,7 @@ std::string ParameterProvider::SnoopLogFilePath() {
     }
   }
 
-  return "/etc/systembt/btsnoop_hci.log";
+  return "/etc/bluetooth/btsnoop_hci.log";
 }
 
 void ParameterProvider::OverrideSnoopLogFilePath(const std::string& path) {

system/main/stack_config.cc

@@ -41,7 +41,7 @@ static std::unique_ptr<config_t> config;
 
 static future_t* init() {
 // TODO(armansito): Find a better way than searching by a hardcoded path.
-#if defined(OS_GENERIC)
+#if defined(OS_GENERIC) && !defined(TARGET_FLOSS)
   const char* path = "bt_stack.conf";
 #else  // !defined(OS_GENERIC)
   const char* path = "/etc/bluetooth/bt_stack.conf";