CommonInstaller: improve log strings

CommonInstaller

@@ -1333,7 +1333,7 @@ nanodroid_install_lib () {
 		0  ) echo "      ${app} does have libs" ;;
 		11 ) echo "      ${app} does not have any libs" ;;
 		50 ) error "  not enough space available!" ;;
-		*  ) error "  installing libs for ${app} failed [${unzip_return}]" ;;
+		*  ) error "  unpacking libs for ${app} failed [${unzip_return}]" ;;
 	esac
 
 	if [ -d ${TMP_LIBDIR}/lib ]; then
@@ -1359,7 +1359,7 @@ nanodroid_install_lib () {
 				for lib in ${srcdir}/*; do
 					echo "        library: $(basename ${lib})"
 					cp ${lib} "${libd}/${lib_arch}/" || \
-						error "installing libraries failed"
+						error "  installing libs for ${app} failed"
 
 					installinfo_add "${libd}/${lib_arch}/$(basename ${lib})"
 				done