ndk-sysroot: Bundle libatomic.a

Fixes #430.

packages/ndk-sysroot/build.sh

@@ -1,10 +1,11 @@
 TERMUX_PKG_HOMEPAGE=https://developer.android.com/tools/sdk/ndk/index.html
 TERMUX_PKG_DESCRIPTION="System header and library files from the Android NDK needed for compiling C programs"
 TERMUX_PKG_VERSION=$TERMUX_NDK_VERSION
-TERMUX_PKG_BUILD_REVISION=4
+TERMUX_PKG_BUILD_REVISION=5
 TERMUX_PKG_NO_DEVELSPLIT=yes
 # Depend on libandroid-support-dev so that iconv.h and libintl.h are available:
 TERMUX_PKG_DEPENDS="libandroid-support-dev"
+TERMUX_PKG_KEEP_STATIC_LIBRARIES="true"
 
 termux_step_extract_into_massagedir () {
 	mkdir -p $TERMUX_PKG_MASSAGEDIR/$TERMUX_PREFIX/lib/pkgconfig $TERMUX_PKG_MASSAGEDIR/$TERMUX_PREFIX/include
@@ -25,6 +26,12 @@ Libs: -L$TERMUX_PREFIX/lib -lz
 Cflags: -I$TERMUX_PREFIX/include
 HERE
 
+	local LIBATOMIC_PATH=$TERMUX_STANDALONE_TOOLCHAIN/$TERMUX_HOST_PLATFORM/lib
+	if [ $TERMUX_ARCH_BITS = 64 ]; then LIBATOMIC_PATH+="64"; fi
+	if [ $TERMUX_ARCH = "arm" ]; then LIBGCC_PATH+="/armv7-a"; fi
+	LIBATOMIC_PATH+="/libatomic.a"
+	cp $LIBATOMIC_PATH $TERMUX_PKG_MASSAGEDIR/$TERMUX_PREFIX/lib/libatomic.a
+
 	# librt and libpthread are built into libc on android, so setup them as symlinks
 	# to libc for compatibility with programs that users try to build:
 	local _SYSTEM_LIBDIR=/system/lib64