Fix non-root installation: ignore chown/chmod errors

Prefix chown root and chmod 4755 commands with - to allow
installation to succeed when running as non-root user.

Affected files:
- programs/dtcm/dtcm/Makefile.am: use localstatedir for spool
- programs/dtsearchpath/dtappg/Makefile.am: ignore setuid errors
- programs/dtsession/Makefile.am: ignore setuid errors
- programs/dtterm/Makefile.am: ignore setuid errors

cde/programs/dtcm/dtcm/Makefile.am

@@ -42,4 +42,4 @@ dtcm_editor_SOURCES = datefield.c     deskset.c       dssw.c \
 		      reminders.c     rfp.c
 
 install-exec-hook:
-	$(INSTALL) -m 0755 -d $(DESTDIR)/var/spool/calendar
+	$(INSTALL) -m 0755 -d $(DESTDIR)$(localstatedir)/spool/calendar

cde/programs/dtsearchpath/dtappg/Makefile.am

@@ -14,5 +14,5 @@ dtappgather_SOURCES = Options.C dtappgather.C dtappgather.h Options.h
 
 # can't use INSTALL here as the program is already installed
 install-exec-hook:
-	chown root $(DESTDIR)$(bindir)/dtappgather
-	chmod 4755 $(DESTDIR)$(bindir)/dtappgather
+	-chown root $(DESTDIR)$(bindir)/dtappgather
+	-chmod 4755 $(DESTDIR)$(bindir)/dtappgather

cde/programs/dtsession/Makefile.am

@@ -130,7 +130,7 @@ sys.session.ive: sys.session.src
 
 install-exec-hook:
 if !HAS_PAM_LIBRARY
-	chown root $(DESTDIR)$(bindir)/dtsession
-	chmod 4755 $(DESTDIR)$(bindir)/dtsession
+	-chown root $(DESTDIR)$(bindir)/dtsession
+	-chmod 4755 $(DESTDIR)$(bindir)/dtsession
 endif
 

cde/programs/dtterm/Makefile.am

@@ -49,7 +49,7 @@ dtterm.ti: terminfoChecklist
 
 install-exec-hook:
 if !HAS_UTEMPTER_LIBRARY
-	chown root $(DESTDIR)$(bindir)/dtterm
-	chmod 4755 $(DESTDIR)$(bindir)/dtterm
+	-chown root $(DESTDIR)$(bindir)/dtterm
+	-chmod 4755 $(DESTDIR)$(bindir)/dtterm
 endif
 	@TIC@ dtterm.ti