Update install_KLayout.md

Author: hpjeonGIT

install_KLayout.md

@@ -2,5 +2,11 @@
 ## when coupled with qt4.8. libcurl for download from internet
 ./build.sh -build /opt/apps/KLayout/0.25.4  -libcurl -j 16 -with-qtbinding -qmake /opt/libs/qt/4.8/bin/qmake
 
-## with qt 5.11
+## if libcurl header or library is required
+- edit qt/X.X/mkspecs/common/linux.conf
+- QMAKE_INCDIR          = /usr/nic/apps/curl/7.61.1/include
+- QQMAKE_LIBS              = -L/usr/nic/apps/curl/7.61.1/lib/
+
+
+## with qt 5.11 - not working
 ./build.sh -build /opt/apps/KLayout/0.25.6 -j 4