The quotes that you removed around the DYLD_FRAMEWORK_PATH step are not needed, at least until the rest of configure.ac and Makefile.pre.in support paths with spaces et al.  However, you missed removing the single quotes around the DYLD_LIBRARY_PATH step here:

RUNSHARED='DYLD_LIBRARY_PATH=`pwd`${DYLD_LIBRARY_PATH:+:${DYLD_LIBRARY_PATH}}'

Otherwise, the patch LGTM; I tested it with --enable-framework and --enable-shared configs on OS X.