one command to find them all..

HABUILD_SDK [sirius] keijo@Constellation:~/mer/android/droid$ find | grep fstab
./hybris/hybris-boot/initramfs/etc/fstab
./system/core/fs_mgr/fs_mgr_fstab.c
./build/tools/device/recovery.fstab.template
./device/sony/shinano-common/rootdir/fstab.qcom
./external/busybox/examples/bootfloppy/etc/fstab
./external/qemu/android/filesystems/fstab_parser_unittest.cpp
./external/qemu/android/filesystems/fstab_parser.h
./external/qemu/android/filesystems/fstab_parser.cpp
./external/e2fsprogs/install-utils/convfstab
./prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.11-4.6/sysroot/usr/include/fstab.h
./prebuilts/gcc/linux-x86/host/x86_64-linux-glibc2.11-4.8/sysroot/usr/include/fstab.h