Use LONG_MAX instead of __WORDSIZE to find size of long

__WORDSIZE isn't guaranteed to have any relation to the size of long,
compare LONG_MAX to INT64_MAX to find if int64_t* will be equivalent
to long*.

Bug: 190084016
Test: m USE_HOST_MUSL=true host-native
Change-Id: Ie50e78b92c1c72c9eaedbdc8267b7e382c40e96b
1 file changed