Make test/uitest depend on the private apps support library

This avoids having to enumerate specific modules in apps, or to have
to include them in libtestutil.a.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/5222)

test/build.info

diff --git a/test/build.info b/test/build.info
index f91800a..c3c7f1e 100644
--- a/test/build.info
+++ b/test/build.info
@@ -12,7 +12,6 @@
   SOURCE[libtestutil.a]=testutil/basic_output.c testutil/output_helpers.c \
           testutil/driver.c testutil/tests.c testutil/cb.c testutil/stanza.c \
           testutil/format_output.c testutil/tap_bio.c \
-          {- rebase_files("../apps", $target{apps_aux_src}) -} \
           testutil/test_cleanup.c testutil/main.c testutil/init.c
   INCLUDE[libtestutil.a]=../include
   DEPEND[libtestutil.a]=../libcrypto
@@ -369,9 +368,11 @@
     DEPEND[cipher_overhead_test]=../libcrypto ../libssl libtestutil.a
   ENDIF
 
-  SOURCE[uitest]=uitest.c ../apps/apps.c ../apps/opt.c
+  SOURCE[uitest]=uitest.c \
+                 {- rebase_files("../apps",
+                                 split(/\s+/, $target{apps_init_src})) -}
   INCLUDE[uitest]=.. ../include ../apps
-  DEPEND[uitest]=../libcrypto ../libssl libtestutil.a
+  DEPEND[uitest]=../apps/libapps.a ../libcrypto ../libssl libtestutil.a
 
   SOURCE[cipherbytes_test]=cipherbytes_test.c
   INCLUDE[cipherbytes_test]=../include