beagle_x15: symlink host cc to clang

This unbreaks the current build breakage; there's nothing too demanding
for clang in u-boot's host C code.

Also remove the unused g++ and gcc symlinks.

Bug: 147296060
Bug: 147325065
Test: lunch beagle_x15-userdebug && m
Change-Id: Ied7d219500ea9323064bf251c0ba648fe2e617a7
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
3 files changed