perf scripts perl: Makefile fix

Fix a typo introduced by recent Makefile changes, in f9af3a4c.  Without it, Perl
scripting support won't get compiled in.

Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Stephane Eranian <eranian@google.com>
LKML-Reference: <1276836006.7762.15.camel@tropicana>
Signed-off-by: NTom Zanussi <tzanussi@gmail.com>
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/Makefile

@@ -577,7 +577,7 @@ ifdef NO_LIBPERL
 else
 	PERL_EMBED_LDOPTS = `perl -MExtUtils::Embed -e ldopts 2>/dev/null`
 	PERL_EMBED_CCOPTS = `perl -MExtUtils::Embed -e ccopts 2>/dev/null`
-	PERL_EMBED_FLAGS=$(PERL_EMBED_CCOPTS) $(PERL_EMBED_LDOPTS)
+	FLAGS_PERL_EMBED=$(PERL_EMBED_CCOPTS) $(PERL_EMBED_LDOPTS)
 
 	ifneq ($(call try-cc,$(SOURCE_PERL_EMBED),$(FLAGS_PERL_EMBED)),y)
 		BASIC_CFLAGS += -DNO_LIBPERL