Say which build wrote a log

Cemu names its build in the "Init" line, which a libretro core writes
before its log.txt exists, so a log sent in never said which commit made
it (sco8487). log.txt now names it under "Loaded title", and the
frontend's log in the first line from retro_init. The hash is the one
CMake takes from git at configure time, as it is for the standalone
build.

(cherry picked from commit e387d972eb8f4a2ae7a27ceb2d2ff992b556ffd8)

src/Cafe/CafeSystem.cpp

@@ -203,6 +203,11 @@ void InfoLog_TitleLoaded()
 {
 	uint64 titleId = CafeSystem::GetForegroundTitleId();
 	cemuLog_log(LogType::Force, "------- Loaded title -------");
+#ifdef RETRO_CORE
+	// The "Init" line that names the build is written before a libretro
+	// core's log.txt exists, so a log sent in never said which commit made it.
+	cemuLog_log(LogType::Force, "Build: {} (libretro)", BUILD_VERSION_WITH_NAME_STRING);
+#endif
 	cemuLog_log(LogType::Force, "TitleId: {:08x}-{:08x}", (uint32)(titleId >> 32), (uint32)(titleId & 0xFFFFFFFF));
 	cemuLog_log(LogType::Force, "TitleVersion: v{}", CafeSystem::GetForegroundTitleVersion());
 	CafeConsoleRegion region = CafeSystem::GetForegroundTitleRegion();

src/libretro/CemuLibretro.cpp

@@ -2498,7 +2498,7 @@ RETRO_API void retro_init()
 	// does not exist until the paths below are set up, so a core that dies in
 	// here leaves nothing behind at all - which is exactly what jacklavin saw
 	// when it started crashing at core selection, before any content.
-	libretro_log(RETRO_LOG_INFO, "retro_init: start\n");
+	libretro_log(RETRO_LOG_INFO, "retro_init: start (%s)\n", BUILD_VERSION_WITH_NAME_STRING);
 
 	LibretroAudioAPI::SetAudioCallback([](const int16_t* data, size_t frames) -> size_t {
 		if (s_audio_submission_allowed && audio_batch_cb && data && frames > 0)