perf tools: Move install-gtk target into rules area

The upcoming fixdep fix needs all targets at the same area, so they'll
fit under a signal condition block.

Move install-gtk target into the rules section.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1480884178-8072-4-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/Makefile.perf

@@ -331,11 +331,6 @@ endif
 ifndef NO_GTK2
   ALL_PROGRAMS += $(OUTPUT)libperf-gtk.so
   GTK_IN := $(OUTPUT)gtk-in.o
-
-install-gtk: $(OUTPUT)libperf-gtk.so
-	$(call QUIET_INSTALL, 'GTK UI') \
-		$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(libdir_SQ)'; \
-		$(INSTALL) $(OUTPUT)libperf-gtk.so '$(DESTDIR_SQ)$(libdir_SQ)'
 endif
 
 ifdef ASCIIDOC8
@@ -712,7 +707,14 @@ check: $(OUTPUT)common-cmds.h
 
 ### Installation rules
 
+ifndef NO_GTK2
+install-gtk: $(OUTPUT)libperf-gtk.so
+	$(call QUIET_INSTALL, 'GTK UI') \
+		$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(libdir_SQ)'; \
+		$(INSTALL) $(OUTPUT)libperf-gtk.so '$(DESTDIR_SQ)$(libdir_SQ)'
+else
 install-gtk:
+endif
 
 install-tools: all install-gtk
 	$(call QUIET_INSTALL, binaries) \