Enable debug for libvpx and add a substep to the makefile

submodules/build/Makefile

@@ -112,6 +112,9 @@ build-% clean-% veryclean-%:
 sdk:
 	make -f builder-iphone-os.mk delivery-sdk
 
+libs:
+	make -f builder-iphone-os.mk multi-arch
+
 download-sdk:
 	make -f builder-iphone-os.mk download-sdk
 
@@ -156,5 +159,5 @@ help:
 	@echo "   *     [arch]-clean-[package] : clean the package for the selected architecture"
 	@echo "   * [arch]-veryclean-[package] : completely clean the package for the selected architecture"
 	@echo ""
-	@echo "   * sdk : re-add all generated libraries to the SDK. Use this only after a full build."
-
+	@echo "   * sdk  : re-add all generated libraries to the SDK. Use this only after a full build."
+	@echo "   * libs : after a rebuild of a subpackage, will mix the new libs in liblinphone-sdk/apple-darwin directory"

submodules/build/builders.d/libvpx.mk

@@ -6,6 +6,11 @@ libvpx_configure_options=\
 	--enable-realtime-only --enable-spatial-resampling \
 	--enable-vp8 --enable-multithread --disable-vp9 
 
+
+ifeq ($(enable_debug),yes)
+	libvpx_configure_options += --enable-debug
+endif
+
 take_binary=
 
 # force take binary, it seems libvpx was fixed since http://git.chromium.org/gitweb/?p=webm/libvpx.git;a=commit;h=33df6d1fc1d268b4901b74b4141f83594266f041
@@ -21,6 +26,7 @@ else ifneq (,$(findstring armv7,$(host)))
 	take_binary = armv7
 else ifneq (,$(findstring aarch64,$(host)))
 	libvpx_configure_options+= --target=arm64-darwin-gcc
+	take_binary = arm64
 else
 	libvpx_configure_options+= --target=x86-darwin10-gcc
 	take_binary = i386