Bug 1024260 - Fixup dependencies in media/libopus/Makefile.in to avoid celt_pitch_xcorr_arm-gnu.o being always rebuilt. r=ted

media/libopus/Makefile.in

@@ -10,15 +10,11 @@ ifeq ($(CPU_ARCH),arm)
 # opcodes; actual arch detection is done at runtime.
 ASFLAGS = -march=armv7-a -mfpu=neon
 
-celt_pitch_xcorr_arm-gnu.$(ASM_SUFFIX): celt_arm_dir celt/arm/armopts-gnu.S
-
-# we need to throw this here because upstream has this path hardcoded
-celt_arm_dir:
-	mkdir -p celt/arm
+celt_pitch_xcorr_arm-gnu.$(ASM_SUFFIX): celt/arm/armopts-gnu.S
 
 # armopts needs a specific rule, because arm2gnu.pl will always add the .S
 # suffix when translating the files that include it.
-celt/arm/armopts-gnu.S: celt/arm/armopts.s
+celt/arm/armopts-gnu.S: $(call mkdir_deps,celt/arm) celt/arm/armopts.s
 	$(PERL) $(srcdir)/celt/arm/arm2gnu.pl < $< > $@
 # For all others, we can use an implicit rule with the configured $(ASM_SUFFIX).
 %-gnu.$(ASM_SUFFIX): celt/arm/%.s