Add kernel uapi headers to sysroot

Add kernel uapi headers to the musl sysroot, as well as the bits
headers in android/include/bits that provide necessary includes for
the bionic uapi headers.

Bug: 190084016
Test: m USE_HOST_MUSL=true host-native
Change-Id: I0edac98c60617418992b93d3150b4e683ebf21f2
1 file changed