debian: fix accidental editing error in libext2fs2t664.symbols #89

Job	Run time
Build and test with ASAN enabled	1m 31s
Build and test with clang	1m 10s
Cross-compile for Android (aarch64)	52s
Build and test with gcc	57s
Cross-compile for Android (armv7a)	30s
Build and test with gcc -m32	1m 6s
Cross-compile for Android (i686)	36s
Build and test on macOS	1m 22s
Build and test with UBSAN enabled	1m 20s
Cross-compile for Android (x86_64)	36s
Build mke2fs on Windows with mingw32	2m 19s
Build mke2fs on Windows with mingw64	2m 31s
	14m 50s

Provide feedback