libtool versioning added for Linux shared ngspice.

And commented out immediately, because not compatible
to KiCad, which is linking to libngsice.so.0.0.0

src/Makefile.am

@@ -592,6 +592,12 @@ libngspice_la_LDFLAGS += -no-undefined
 EXTRA_DIST += ngspice.def
 endif
 
+## if !SHWIN
+## if !SHCYG
+## libngspice_la_LDFLAGS += -version-info 0:@VERSION@:0
+## endif
+## endif
+
 SHAREDSPICE_VERSION = @VERSION@
 
 endif SHARED_MODULE