utils: build sha1/disk cache only with Android/Autoconf

Earlier commit imported a SHA1 implementation and relaxed the SHA1 and
disk cache handling, broking the Windows builds.

Restrict things for now until we get to a proper fix.

Fixes: d1efa09d34 "util: import sha1 implementation from OpenBSD"
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>

src/compiler/glsl/tests/cache_test.c

@@ -37,6 +37,8 @@
 
 bool error = false;
 
+#ifdef ENABLE_SHADER_CACHE
+
 static void
 expect_equal(uint64_t actual, uint64_t expected, const char *test)
 {
@@ -378,10 +380,12 @@ test_put_key_and_get_key(void)
 
    disk_cache_destroy(cache);
 }
+#endif /* ENABLE_SHADER_CACHE */
 
 int
 main(void)
 {
+#ifdef ENABLE_SHADER_CACHE
    int err;
 
    test_disk_cache_create();
@@ -392,6 +396,7 @@ main(void)
 
    err = rmrf_local(CACHE_TEST_TMP);
    expect_equal(err, 0, "Removing " CACHE_TEST_TMP " again");
+#endif /* ENABLE_SHADER_CACHE */
 
    return error ? 1 : 0;
 }