luacurl: fixed build 64bit platforms compiling with -fPIC

lua/luacurl/luacurl.conf

@@ -21,7 +21,7 @@ pkg_luacurl_custmain() {
 	local CURLCFLAGS=$( pkg-config --cflags-only-I libcurl )
 	local CURLLIBS=$( pkg-config --libs libcurl )
 
-	eval $CC -shared $LUACFLAGS $CURLCFLAGS luacurl.c -o luacurl.so $LUALIBS $CURLLIBS
+	eval $CC -shared -fPIC $LUACFLAGS $CURLCFLAGS luacurl.c -o luacurl.so $LUALIBS $CURLLIBS
 	cp -avf luacurl.so $root$lualibdir
 }