credui: Add tests for CredUIPromptForCredentialsW and CredUIConfirmCredentialsW.

Makefile.in

diff --git a/Makefile.in b/Makefile.in
index 1de6a53..96d395b 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -183,6 +183,7 @@
 	dlls/comdlg32/tests/Makefile \
 	dlls/compstui/Makefile \
 	dlls/credui/Makefile \
+	dlls/credui/tests/Makefile \
 	dlls/crtdll/Makefile \
 	dlls/crypt32/Makefile \
 	dlls/crypt32/tests/Makefile \
@@ -558,6 +559,7 @@
 dlls/comdlg32/tests/Makefile: dlls/comdlg32/tests/Makefile.in dlls/Maketest.rules
 dlls/compstui/Makefile: dlls/compstui/Makefile.in dlls/Makedll.rules
 dlls/credui/Makefile: dlls/credui/Makefile.in dlls/Makedll.rules
+dlls/credui/tests/Makefile: dlls/credui/tests/Makefile.in dlls/Maketest.rules
 dlls/crtdll/Makefile: dlls/crtdll/Makefile.in dlls/Makedll.rules
 dlls/crypt32/Makefile: dlls/crypt32/Makefile.in dlls/Makedll.rules
 dlls/crypt32/tests/Makefile: dlls/crypt32/tests/Makefile.in dlls/Maketest.rules