depends: use MacOS friendly sed syntax in qt.mk

Author: Sjors

depends/packages/qt.mk

@@ -129,7 +129,7 @@ define $(package)_preprocess_cmds
   cp -f qtbase/mkspecs/macx-clang/qplatformdefs.h qtbase/mkspecs/macx-clang-linux/ &&\
   cp -f $($(package)_patch_dir)/mac-qmake.conf qtbase/mkspecs/macx-clang-linux/qmake.conf && \
   cp -r qtbase/mkspecs/linux-arm-gnueabi-g++ qtbase/mkspecs/bitcoin-linux-g++ && \
-  sed -i s/arm-linux-gnueabi-/$(host)-/g qtbase/mkspecs/bitcoin-linux-g++/qmake.conf && \
+  sed -i.old "s/arm-linux-gnueabi-/$(host)-/g" qtbase/mkspecs/bitcoin-linux-g++/qmake.conf && \
   patch -p1 -i $($(package)_patch_dir)/fix_qt_pkgconfig.patch &&\
   patch -p1 -i $($(package)_patch_dir)/fix_configure_mac.patch &&\
   patch -p1 -i $($(package)_patch_dir)/fix_no_printer.patch &&\