ndk-multilib: add static libc++

Note: we patched clang to look for libc++_shared instead of libc++. So to have
static link mode working properly, we need libc++_shared.a linker script which
will link with libc++_static.a and libc++abi.a.

packages/ndk-multilib/build.sh

@@ -2,7 +2,7 @@ TERMUX_PKG_HOMEPAGE=https://developer.android.com/tools/sdk/ndk/index.html
 TERMUX_PKG_DESCRIPTION="Multilib binaries for cross-compilation"
 TERMUX_PKG_LICENSE="NCSA"
 TERMUX_PKG_VERSION=$TERMUX_NDK_VERSION
-TERMUX_PKG_REVISION=2
+TERMUX_PKG_REVISION=3
 TERMUX_PKG_SKIP_SRC_EXTRACT=true
 TERMUX_PKG_PLATFORM_INDEPENDENT=true
 TERMUX_PKG_NO_STATICSPLIT=true
@@ -23,6 +23,8 @@ prepare_libs() {
 	cp $BASEDIR/lib{c,dl,log,m}.so $TERMUX_PKG_MASSAGEDIR/$TERMUX_PREFIX/$SUFFIX/lib
 	cp $BASEDIR/lib{c,dl,m}.a $TERMUX_PKG_MASSAGEDIR/$TERMUX_PREFIX/$SUFFIX/lib
 	cp $TERMUX_STANDALONE_TOOLCHAIN/sysroot/usr/lib/aarch64-linux-android/libc++_shared.so $TERMUX_PKG_MASSAGEDIR/$TERMUX_PREFIX/$SUFFIX/lib
+	cp $TERMUX_STANDALONE_TOOLCHAIN/sysroot/usr/lib/aarch64-linux-android/lib{c++_static,c++abi}.a $TERMUX_PKG_MASSAGEDIR/$TERMUX_PREFIX/$SUFFIX/lib
+	echo 'INPUT(-lc++_static -lc++abi)' > $TERMUX_PKG_MASSAGEDIR/$TERMUX_PREFIX/$SUFFIX/lib/libc++_shared.a
 
 	LIBATOMIC=$NDK/toolchains/${NDK_SUFFIX}-*/prebuilt/linux-*/${SUFFIX}/lib
 	if [ $ARCH = "arm64" ] || [ $ARCH = "x86_64" ]; then LIBATOMIC+="64"; fi