Summary: - I noticed that the hello (ELF) application causes a memory leak. - Finally, I found that the data section is not deallocated. - This commit fixes this issue. Impact: - ELF loader with CONFIG_ARCH_ADDRENV=n Testing: - Tested with the following configs - sprensense:elf, esp32-devkitc:elf, sabre-6quad:elf - spresense:wifi_smp, rv-virt:nsh64, sabre-6quad:netnsh Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>