Update git configs for mac build

conanoc · conanoc · commit 56ef03666135 · 2018-03-22T15:21:25.000+09:00
diff --git a/.gitignore b/.gitignore
@@ -6,6 +6,7 @@
 *.pb
 *.gcda
 *.gcno
+*.dSYM
 TAGS
 ccan/tools/configurator/configurator
 ccan/ccan/cdump/tools/cdump-enumstr
diff --git a/.gitmodules b/.gitmodules
@@ -13,3 +13,4 @@
 [submodule "external/libwally-core"]
 	path = external/libwally-core
 	url = https://github.com/ElementsProject/libwally-core.git
+	ignore = dirty
