Give strip depfile a unique name, properly include it

$(LOCAL_BUILT_MODULE).d may conflict with the .d file for a .o file,
use $(LOCAL_BUILT_MODULE).strip.d.  Also pass the required second
arg to include-depfile.

Bug: 148387048
Test: m checkbuild
Change-Id: I1f5f4c38010294a12d6777439b0f66c0102c1c96