Release v1.4: Update minor version number to 4
Release v1.4: Update minor version number to 4

Change-Id: I8676a22649dce92d0ddd98013fc6dafcfbe94c90
Signed-off-by: David Cunado <75971c98bb669d0ec23f3f9b951926ac56376054@arm.com>

achingupta/arm-trusted-firmware,lsigithub/arm-trusted-firmware_public,lsigithub/arm-trusted-firmware_public,achingupta/arm-trusted-firmware