kernel32: Add a stub implementation for TermsrvAppInstallMode.

dlls/kernel32/kernel32.spec

@@ -1057,7 +1057,7 @@
 @ stub TerminateJobObject
 @ stdcall TerminateProcess(long long)
 @ stdcall TerminateThread(long long)
-@ stub TermsrvAppInstallMode
+@ stdcall TermsrvAppInstallMode()
 @ stdcall Thread32First(long ptr)
 @ stdcall Thread32Next(long ptr)
 @ stdcall ThunkConnect32(ptr str str str ptr ptr)

dlls/kernel32/version.c

@@ -363,3 +363,14 @@ void WINAPI DiagOutput16(LPCSTR str)
         /* FIXME */
         TRACE("DIAGOUTPUT:%s\n", debugstr_a(str));
 }
+
+/***********************************************************************
+ *           TermsrvAppInstallMode       (KERNEL32.@)
+ *
+ * Find out whether the terminal server is in INSTALL or EXECUTE mode.
+ */
+BOOL WINAPI TermsrvAppInstallMode(void)
+{
+    FIXME("stub\n");
+    return FALSE;
+}