Add heap symbols to esp32_c3

Author: Uthedris

port/espressif/esp/ld/esp32_c3/esp32_c3.ld.base

@@ -82,5 +82,12 @@ SECTIONS
         microzig_bss_end = .;
     } > dram
 
+    .dram.heap (NOLOAD) :
+    {
+        microzig_heap_start = .;
+        . = ORIGIN(dram) + LENGTH(dram);
+        microzig_heap_end   = .;
+    } > dram
+
     PROVIDE(__global_pointer$ = microzig_data_start + 0x800);
 }

port/espressif/esp/ld/esp32_c3/esp32_c3_direct_boot.ld.base

@@ -39,6 +39,13 @@ SECTIONS
       microzig_bss_end = .;
   } > ram0
 
+  .heap (NOLOAD) :
+  {
+      microzig_heap_start = .;
+      . = ORIGIN(ram0) + LENGTH(ram0);
+      microzig_heap_end   = .;
+  } > ram0
+
   .flash_end :
   {
       PROVIDE(microzig_flash_end = .);