feat: add gdb support to zba

lib/SDL.zig

@@ -1 +1 @@
-Subproject commit 2025889b612f345698feff44fc245501bff637e9
+Subproject commit 2fbd4b228516bf08348a3173f1446c7e8d75540a

lib/known-folders

@@ -1 +1 @@
-Subproject commit 6b37490ac7285133bf09441850b8102c9728a776
+Subproject commit 24845b0103e611c108d6bc334231c464e699742c

lib/zig-clap

@@ -1 +1 @@
-Subproject commit 6c9ca9025199b145c42a75d10cadb3f97879ee6d
+Subproject commit 88edafd00ec25dcc01deb8fc69e9864a16f8717c

src/core/ppu.zig

@@ -843,12 +843,7 @@ pub const Ppu = struct {
                 const is_top_layer = (top_layer >> layer) & 1 == 1;
 
                 if (is_top_layer) {
-                    const pixel = self.scanline.btm()[i];
-
-                    // FIXME: Can't I do this check ealier? Test Amazing Mirror File Select, bld_demo.gba
-                    if (!pixel.isSet())
-                        self.scanline.btm()[i] = Scanline.Pixel.from(.Background, bgr555); // this is intentional
-
+                    self.scanline.btm()[i] = Scanline.Pixel.from(.Background, bgr555); // this is intentional
                     return;
                 }
             },