libcaca: Note that it doesn't build with clang

packages/libcaca/build.sh

@@ -6,6 +6,8 @@ TERMUX_PKG_SRCURL=http://fossies.org/linux/privat/libcaca-${TERMUX_PKG_VERSION}.
 #                     http://caca.zoy.org/files/libcaca/libcaca-${TERMUX_PKG_VERSION}.tar.gz
 TERMUX_PKG_DEPENDS="ncurses"
 TERMUX_PKG_EXTRA_CONFIGURE_ARGS="--disable-python --disable-java --disable-ruby --disable-doc"
+# "fatal error: error in backend: Do not know how to split this operator's operand":
+TERMUX_PKG_CLANG=no
 
 termux_step_post_configure () {
 	if [ $TERMUX_ARCH = x86_64 ]; then