Add Make to the list of dependencies
Add Make to the list of dependencies

Make is a required dependency, but it was not specified in the install guide.
This commit adds it.

Signed-off-by: Michele Tartara <05f7077a2c6cbbdc4af4ba42e3ef89a0df846179@google.com>
Reviewed-by: Thomas Thrainer <98bdeac947eb8ca18146e9ce7f092788ec242cd1@google.com>

leshchevds/ganeti,ganeti/ganeti,apyrgio/snf-ganeti,mbakke/ganeti,ganeti/ganeti,bitemyapp/ganeti,onponomarev/ganeti,apyrgio/snf-ganeti,andir/ganeti,grnet/snf-ganeti,andir/ganeti,leshchevds/ganeti,andir/ganeti,yiannist/ganeti,mbakke/ganeti,yiannist/ganeti,apyrgio/ganeti,yiannist/ganeti,ganeti/ganeti,onponomarev/ganeti,dimara/ganeti,grnet/snf-ganeti,apyrgio/ganeti,dimara/ganeti,ganeti-github-testing/ganeti-test-1,leshchevds/ganeti,ganeti-github-testing/ganeti-test-1,bitemyapp/ganeti,mbakke/ganeti