package/clang: bump to version 5.0.2
5.0.2 is API and ABI compatible with 5.0.0 and 5.0.1 and includes
mitigations for CVE-2017-5715 (Spectre Variant 2) for X86 and MIPS.
Signed-off-by: Valentin Korenblit <valentin.korenblit@smile.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>