Build win librariles with docker cross compiler image

Makefile

@@ -97,12 +97,12 @@ $(NATIVE_DLL): $(SQLITE_OUT)/$(LIBNAME)
 	cp $< $(NATIVE_TARGET_DIR)/$(LIBNAME)
 
 # for cross-compilation on Ubuntu, install the g++-mingw-w64-i686 package
-win32: 
-	$(MAKE) native CROSS_PREFIX=i686-w64-mingw32- OS_NAME=Windows OS_ARCH=x86
+win32: $(SQLITE_UNPACKED) jni-header
+	./docker/dockcross-windows-x86 bash -c 'make native CROSS_PREFIX=i686-w64-mingw32.static- OS_NAME=Windows OS_ARCH=x86'
 
 # for cross-compilation on Ubuntu, install the g++-mingw-w64-x86-64 package
-win64: 
-	$(MAKE) native CROSS_PREFIX=x86_64-w64-mingw32- OS_NAME=Windows OS_ARCH=x86_64
+win64: $(SQLITE_UNPACKED) jni-header
+	./docker/dockcross-windows-x64 bash -c 'make native CROSS_PREFIX=x86_64-w64-mingw32.static- OS_NAME=Windows OS_ARCH=x86_64'
 
 linux32:
 	$(MAKE) native OS_NAME=Linux OS_ARCH=x86

Makefile.common

@@ -129,15 +129,15 @@ Mac-x86_64_LINKFLAGS := -dynamiclib
 Mac-x86_64_LIBNAME   := libsqlitejdbc.jnilib
 Mac-x86_64_SQLITE_FLAGS  := 
 
-Windows-x86_CC           := i686-w64-mingw32-gcc
-Windows-x86_STRIP        := i686-w64-mingw32-strip
+Windows-x86_CC           := $(CROSS_PREFIX)gcc
+Windows-x86_STRIP        := $(CROSS_PREFIX)strip
 Windows-x86_CCFLAGS      := -D_JNI_IMPLEMENTATION_ -Ilib/inc_win -O2
 Windows-x86_LINKFLAGS    := -Wl,--kill-at -shared -static-libgcc
 Windows-x86_LIBNAME      := sqlitejdbc.dll
 Windows-x86_SQLITE_FLAGS := 
 
-Windows-x86_64_CC           := x86_64-w64-mingw32-gcc
-Windows-x86_64_STRIP        := x86_64-w64-mingw32-strip
+Windows-x86_64_CC           := $(CROSS_PREFIX)gcc
+Windows-x86_64_STRIP        := $(CROSS_PREFIX)strip
 Windows-x86_64_CCFLAGS      := -D_JNI_IMPLEMENTATION_ -Ilib/inc_win -O2
 Windows-x86_64_LINKFLAGS    := -Wl,--kill-at -shared -static-libgcc
 Windows-x86_64_LIBNAME      := sqlitejdbc.dll