fixup! build: Generate toolchain.cmake in depends

Set Objective C++ `*_INIT` flags in the toolchain file.

Author: hebasto

depends/toolchain.cmake.in

@@ -58,12 +58,15 @@ endif()
 
 if(NOT DEFINED CMAKE_CXX_FLAGS_INIT)
   set(CMAKE_CXX_FLAGS_INIT "@CXXFLAGS@")
+  set(CMAKE_OBJCXX_FLAGS_INIT "@CXXFLAGS@")
 endif()
 if(NOT DEFINED CMAKE_CXX_FLAGS_RELWITHDEBINFO_INIT)
   set(CMAKE_CXX_FLAGS_RELWITHDEBINFO_INIT "@CXXFLAGS_RELEASE@")
+  set(CMAKE_OBJCXX_FLAGS_RELWITHDEBINFO_INIT "@CXXFLAGS_RELEASE@")
 endif()
 if(NOT DEFINED CMAKE_CXX_FLAGS_DEBUG_INIT)
   set(CMAKE_CXX_FLAGS_DEBUG_INIT "@CXXFLAGS_DEBUG@")
+  set(CMAKE_OBJCXX_FLAGS_DEBUG_INIT "@CXXFLAGS_DEBUG@")
 endif()
 
 if(NOT DEFINED CMAKE_CXX_COMPILER)