perf/ui/gtk: Fix gtk2 build

Ravi Bangoria reported an issue when doing the gtk2 feature detection on
Fedora 31, where some types got deprecated:

  /usr/include/gtk-2.0/gtk/gtktypeutils.h:236:1: error: ‘GTypeDebugFlags’ is deprecated [-Werror=deprecated-declarations]
    236 | void            gtk_type_init   (GTypeDebugFlags    debug_flags);

Fix this for perf by allowing the compile to pass with deprecated
symbols via the -Wno-deprecated-declarations compiler directive.

Reported-by: Ravi Bangoria <[email protected]>
Signed-off-by: Jiri Olsa <[email protected]>
Tested-by: Ravi Bangoria <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Jelle van der Waa <[email protected]>
Cc: Michael Petlan <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lore.kernel.org/lkml/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

Author: olsajiri

tools/build/feature/Makefile

@@ -197,7 +197,7 @@ $(OUTPUT)test-libcrypto.bin:
 	$(BUILD) -lcrypto
 
 $(OUTPUT)test-gtk2.bin:
-	$(BUILD) $(shell $(PKG_CONFIG) --libs --cflags gtk+-2.0 2>/dev/null)
+	$(BUILD) $(shell $(PKG_CONFIG) --libs --cflags gtk+-2.0 2>/dev/null) -Wno-deprecated-declarations
 
 $(OUTPUT)test-gtk2-infobar.bin:
 	$(BUILD) $(shell $(PKG_CONFIG) --libs --cflags gtk+-2.0 2>/dev/null)

tools/perf/ui/gtk/Build

@@ -1,4 +1,4 @@
-CFLAGS_gtk += -fPIC $(GTK_CFLAGS)
+CFLAGS_gtk += -fPIC $(GTK_CFLAGS) -Wno-deprecated-declarations
 
 gtk-y += browser.o
 gtk-y += hists.o