libandroid-support: Add back some musl-multibyte

This fixes e.g. findutils find.

packages/libandroid-support/build.sh

@@ -1,14 +1,14 @@
 TERMUX_PKG_HOMEPAGE=https://developer.android.com/tools/sdk/ndk/index.html
 TERMUX_PKG_DESCRIPTION="Library extending the Android C library (Bionic) for additional multibyte, locale and math support"
 # Increase last digit each time a patch changes.
-TERMUX_PKG_VERSION=${TERMUX_NDK_VERSION}.5
+TERMUX_PKG_VERSION=${TERMUX_NDK_VERSION}.6
 TERMUX_PKG_BUILD_IN_SRC=yes
 TERMUX_PKG_ESSENTIAL=yes
 
 termux_step_post_extract_package () {
         cd $TERMUX_PKG_SRCDIR
 	mkdir -p src/musl-locale/ src/musl-multibyte/ include/
-	cp $NDK/sources/android/support/src/musl-multibyte/mblen.c src/musl-multibyte/
+	cp $NDK/sources/android/support/src/musl-multibyte/{mblen.c,mbsrtowcs.c,mbsnrtowcs.c,libc.h,internal.h,internal.c} src/musl-multibyte/
 	cp $NDK/sources/android/support/src/musl-locale/{catclose.c,catgets.c,catopen.c} src/musl-locale/
 	cp $NDK/sources/android/support/src/musl-locale/{langinfo.c,intl.c,iconv.c} src/musl-locale/
 	cp $NDK/sources/android/support/include/* include/