pbio/platform/ev3: Rearrange sections so that .pru comes earlier

Without this change, the ELF file contains padding for the .bss section.
After this change, the .bss section is omitted in the file.

Author: ArcaneNibble

lib/pbio/platform/ev3/platform.ld

@@ -29,6 +29,15 @@ SECTIONS
         *(.rodata.*)
     } > DDR
 
+    .pru :
+    {
+        . = ALIGN(4);
+        _pru0_start = .;
+        KEEP(*(.pru0));
+        . = ALIGN(4);
+        _pru0_end = .;
+    } >DDR
+
     .data :
     {
         . = ALIGN(4);
@@ -46,15 +55,6 @@ SECTIONS
         _bss_end = .;
     } > DDR
 
-    .pru :
-    {
-        . = ALIGN(4);
-        _pru0_start = .;
-        KEEP(*(.pru0));
-        . = ALIGN(4);
-        _pru0_end = .;
-    } >DDR
-
     /* Uninitialized (not zeroed at startup) data section */
 
     .noinit (NOLOAD) :