build: also define HOSTCC if CC is set

To consistently use the same compiler, also set the HOSTCC to CC in all
`make` invocations. Otherwise we might even depend on a host dependency
that does not exist or would be invalid (HOSTCC=gcc is implicit).

Bug: 135922132
Change-Id: Ib1e3cb620a7446f958963fc60de2216fb9b6ca6f
Signed-off-by: Matthias Maennich <maennich@google.com>
1 file changed