UBUNTU: SAUCE: tools: use CC for linking acpi tools

UBUNTU: SAUCE: tools: use CC for linking acpi tools

Prior to 7ed1c1901fe5 ("tools: fix cross-compile var clobbering")
the acpi tools makefiles were using gcc for linking. That commit
causes ld to be used instead, however this doesn't work as the
flags supplied are meant for gcc and not ld. Change the acpi
tools rules to use $(QUIET_LINK)$(CC) for linking to fix this
regression.

Fixes: 7ed1c1901fe5 ("tools: fix cross-compile var clobbering")
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>