glibc-package: Fix conflict error when enable multilib.

glibc-package: Fix conflict error when enable multilib.

file /usr/include/bits/math-vector.h from install of lib32-libc6-dev-2.38-r0.armv7ahf_neon conflicts with file from package libc6-dev-2.38-r0.aarch64

Reference to the git log of glibc, upstream modified math-vector.h for
aarch64, so this file has many differences from aarch32.
For detailed modifications, please refer to these two commit log of
glibc:
commit 4a9392ffc27ad280f84779eea3ba01f2c134d1d8
commit 78c01a5cbeb6717ffa2d4d66bb90ac5c39bd81a9

Signed-off-by: Lei Maohui <leimaohui@fujitsu.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>