flex: Do not split up in -dev variant

The only header file is FlexLexer.h, and
this is not split up in debian.

packages/flex/build.sh

@@ -1,7 +1,10 @@
 TERMUX_PKG_HOMEPAGE=http://flex.sourceforge.net/
 TERMUX_PKG_DESCRIPTION="Fast lexical analyser generator"
 TERMUX_PKG_VERSION=2.6.0
-TERMUX_PKG_BUILD_REVISION=1
+TERMUX_PKG_BUILD_REVISION=2
 TERMUX_PKG_SRCURL=http://downloads.sourceforge.net/project/flex/flex-${TERMUX_PKG_VERSION}.tar.xz
 TERMUX_PKG_DEPENDS="m4"
 TERMUX_PKG_EXTRA_CONFIGURE_ARGS+="ac_cv_path_M4=$TERMUX_PREFIX/bin/m4"
+TERMUX_PKG_NO_DEVELSPLIT=yes
+TERMUX_PKG_CONFLICTS="flex-dev"
+TERMUX_PKG_REPLACES="flex-dev"