[gnome-panel/wip-warnings] clock: add $(srcdir) to path

[Sebastian Geiger <segeiger src gnome org>]

commit f3dc5e2f79429182a374565beef9f7a5db66cfe3
Author: Sebastian Geiger <sbastig gmx net>
Date:   Mon Feb 24 22:32:01 2020 +0100

    clock: add $(srcdir) to path
    
    Without the `$(srcdir)` prefix
    the header file will not be found
    and a warning will be emitted at
    build time.

 modules/clock/Makefile.am | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/modules/clock/Makefile.am b/modules/clock/Makefile.am
index 97b3c308f..12be70849 100644
--- a/modules/clock/Makefile.am
+++ b/modules/clock/Makefile.am
@@ -72,7 +72,7 @@ clock_la_LDFLAGS = \
        $(NULL)
 
 clock_enum_headers = \
-       clock-utils.h \
+       $(srcdir)/clock-utils.h \
        $(NULL)
 
 clock-typebuiltins.c: $(clock_enum_headers)