mxe-conf.cmake: Workaround buggy windres rules

Signed-off-by: Timothy Gu <timothygu99@gmail.com>

src/pkgconf.mk

@@ -62,8 +62,9 @@ define $(PKG)_BUILD_COMMON
      echo 'set(CMAKE_MODULE_PATH $(PWD)/src/cmake) # For mxe FindPackage scripts'; \
      echo 'set(CMAKE_INSTALL_PREFIX $(PREFIX)/$(TARGET) CACHE PATH "Installation Prefix")'; \
      echo 'set(CMAKE_BUILD_TYPE Release CACHE STRING "Debug|Release|RelWithDebInfo|MinSizeRel")'; \
-     echo 'set(CMAKE_CROSS_COMPILING ON) # Workaround for http://www.cmake.org/Bug/view.php?id=14075') \
-     > '$(CMAKE_TOOLCHAIN_FILE)'
+     echo 'set(CMAKE_CROSS_COMPILING ON) # Workaround for http://www.cmake.org/Bug/view.php?id=14075'; \
+     echo 'set(CMAKE_RC_COMPILE_OBJECT "<CMAKE_RC_COMPILER> -O coff <FLAGS> <DEFINES> -o <OBJECT> <SOURCE>") # Workaround for buggy windres rules'; \
+     ) > '$(CMAKE_TOOLCHAIN_FILE)'
 endef
 
 define $(PKG)_BUILD