hostcc: update the links to point to glibc2.17-4.8

as glibc2.15-4.8 was removed from manifest by change here:
https://android-review.googlesource.com/c/platform/manifest/+/906375/2/default.xml

Test: make droidcore bootfit_img for x15 build

Change-Id: I7b5cda732ef8edb2cb7ad755c6f3958386f7abd8
Signed-off-by: Yongqin Liu <yongqin.liu@linaro.org>
7 files changed