mdsplus: Added explicit CFLAGS to configure command line invocation [skip appveyor]
-./configure --prefix=$PREFIX --enable-shared --disable-java --disable-dependency-tracking --with-readline=$PREFIX --with-xml-prefix=$PREFIX
+./configure --prefix=$PREFIX --enable-shared --disable-java --disable-dependency-tracking --with-readline=$PREFIX --with-xml-prefix=$PREFIX CFLAGS="-I${PREFIX}/include -I${PREFIX}/include/libxml2"
make
make install
cd mdsobjects/python
