test: use canonical nested library imports

lib/hash/adler32/adler32_test.ww

@@ -1,6 +1,6 @@
 package adler32_test;
 
-import adler32;
+import hash.adler32;
 
 fn putstr(s: str, into: []u8, off: i32) i32 = {
 	let i: i32 = 0;

lib/hash/crc16/crc16_test.ww

@@ -1,6 +1,6 @@
 package crc16_test;
 
-import crc16;
+import hash.crc16;
 
 fn putstr(s: str, into: []u8, off: i32) i32 = {
 	let i: i32 = 0;

lib/hash/crc32/crc32_test.ww

@@ -1,6 +1,6 @@
 package crc32_test;
 
-import crc32;
+import hash.crc32;
 
 fn putstr(s: str, into: []u8, off: i32) i32 = {
 	let i: i32 = 0;

lib/hash/crc64/crc64_test.ww

@@ -1,6 +1,6 @@
 package crc64_test;
 
-import crc64;
+import hash.crc64;
 
 fn putstr(s: str, into: []u8, off: i32) i32 = {
 	let i: i32 = 0;

lib/hash/siphash/siphash_test.ww

@@ -1,6 +1,6 @@
 package siphash_test;
 
-import siphash;
+import hash.siphash;
 
 fn putstr(s: str, into: []u8, off: i32) i32 = {
 	let i: i32 = 0;