[bootloader] Fix UEFI firmware workaround for 32-bit UEFI.

On 32-bit UEFI (note that the bitness of the firmware is what matters
here, not the bitness of the distribution), instead of copying
grubx64.efi to bootx64.efi, copy grubia32.efi to bootia32.efi.

Patch by TeHMoroS from SparkyLinux.

CAL-403 #close

src/modules/bootloader/main.py

@@ -231,9 +231,13 @@ def install_grub(efi_directory, fw_type):
             check_target_env_call(["mkdir", "-p", efi_boot_directory])
 
         # Workaround for some UEFI firmwares
+        efi_file_source = {"32": os.path.join(efi_directory_firmware, efi_bootloader_id, "grubia32.efi"),
+                           "64": os.path.join(efi_directory_firmware, efi_bootloader_id, "grubx64.efi")}
+        efi_file_target = {"32": os.path.join(efi_boot_directory, "bootia32.efi"),
+                           "64": os.path.join(efi_boot_directory, "bootx64.efi")}
         check_target_env_call(["cp",
-                               os.path.join(efi_directory_firmware, efi_bootloader_id, "grubx64.efi"),
-                               os.path.join(efi_boot_directory, "bootx64.efi")])
+                               efi_file_source[efi_bitness],
+                               efi_file_target[efi_bitness]])
     else:
         print("Bootloader: grub (bios)")
         boot_loader = libcalamares.globalstorage.value("bootLoader")