libgcc: Support building using clang

packages/libgcc/build.sh

@@ -5,5 +5,12 @@ TERMUX_PKG_KEEP_STATIC_LIBRARIES="true"
 
 termux_step_extract_into_massagedir () {
         mkdir -p $TERMUX_PKG_MASSAGEDIR/$TERMUX_PREFIX/lib/
-	cp $TERMUX_STANDALONE_TOOLCHAIN/lib/gcc/$TERMUX_HOST_PLATFORM/4.9/libgcc.a $TERMUX_PKG_MASSAGEDIR/$TERMUX_PREFIX/lib/
+
+
+	if [ "$TERMUX_CLANG" = "" ]; then
+		LIBGCC_PATH=lib/gcc/$TERMUX_HOST_PLATFORM/4.9/libgcc.a
+	else
+		LIBGCC_PATH=lib/gcc/$TERMUX_HOST_PLATFORM/4.9.x/libgcc.a
+	fi
+	cp $TERMUX_STANDALONE_TOOLCHAIN/$LIBGCC_PATH $TERMUX_PKG_MASSAGEDIR/$TERMUX_PREFIX/lib/
 }