flex: Update from 2.6.3 to 2.6.4

packages/flex/build.sh

@@ -1,8 +1,8 @@
 TERMUX_PKG_HOMEPAGE=https://github.com/westes/flex
 TERMUX_PKG_DESCRIPTION="Fast lexical analyser generator"
-TERMUX_PKG_VERSION=2.6.3
+TERMUX_PKG_VERSION=2.6.4
 TERMUX_PKG_SRCURL=https://github.com/westes/flex/releases/download/v${TERMUX_PKG_VERSION}/flex-${TERMUX_PKG_VERSION}.tar.gz
-TERMUX_PKG_SHA256=68b2742233e747c462f781462a2a1e299dc6207401dac8f0bbb316f48565c2aa
+TERMUX_PKG_SHA256=e87aae032bf07c26f85ac0ed3250998c37621d95f8bd748b31f15b33c45ee995
 TERMUX_PKG_DEPENDS="m4"
 TERMUX_PKG_HOSTBUILD=true
 TERMUX_PKG_EXTRA_CONFIGURE_ARGS+="ac_cv_path_M4=$TERMUX_PREFIX/bin/m4"