Add -no-undefined to the libtool flags
Add -no-undefined to the libtool flags

This allows building DLLs for windows - libtool doesn't even
try to do that unless this flag is specified.

servkey/libjson,CyanogenMod/android_external_json-c,chenha0/json-c,Nzbuu/json-c,rgerhards/json-c,PureSwift/json-c,cubieb/json-c,rgerhards/json-c,Amineahd/json-c,UAVmatrix/json-c,haoranzeus/json-c,cubieb/json-c,rgerhards/json-c,Nzbuu/json-c,alagoutte/json-c,UAVmatrix/json-c,CyanogenMod/android_external_json-c,colemancda/json-c,haoranzeus/json-c,PureSwift/json-c,chenha0/json-c,Distrotech/json-c,CyanogenMod/android_external_json-c,Amineahd/json-c,UAVmatrix/json-c,servkey/libjson,Nzbuu/json-c,cubieb/json-c,haoranzeus/json-c,alagoutte/json-c,Distrotech/json-c,UAVmatrix/json-c,Distrotech/json-c,Nzbuu/json-c,colemancda/json-c,Distrotech/json-c,Amineahd/json-c,colemancda/json-c,servkey/libjson,chenha0/json-c,PureSwift/json-c,PureSwift/json-c,alagoutte/json-c,CyanogenMod/android_external_json-c