IVGCVSW-4117 Update version number to 19.11
IVGCVSW-4117 Update version number to 19.11

Signed-off-by: Aron Virginas-Tar <3a0dcb9f237ba4421ab064af2ee32b804b28219b@arm.com>
Change-Id: If56648c1d51014b872e81ff4239060ccbf55e8dc

ARM-software/armnn,ARM-software/armnn,ARM-software/armnn