gn2bp: Fix incorrect aprotoc command

* dllexport_decl sometimes used brackets in its value which isn't allowed in a bash command. This fix adds apostrophe around the value.

Test: m cronet_aml_net_net
Change-Id: Ic78f0dee38eb6407ac61a709034967a3f77e730b
diff --git a/tools/gn2bp/Android.bp.swp b/tools/gn2bp/Android.bp.swp
index 5fe039b..5d9da5e 100644
--- a/tools/gn2bp/Android.bp.swp
+++ b/tools/gn2bp/Android.bp.swp
@@ -3086,7 +3086,7 @@
          "--cc-out-dir " +
          "$(genDir) " +
          "--cc-options " +
-         "dllexport_decl=NET_EXPORT_PRIVATE: " +
+         "dllexport_decl='NET_EXPORT_PRIVATE:' " +
          " " +
          "--include " +
          "$(location net/base/net_export.h) " +
@@ -3118,7 +3118,7 @@
          "--cc-out-dir " +
          "$(genDir) " +
          "--cc-options " +
-         "dllexport_decl=NET_EXPORT_PRIVATE: " +
+         "dllexport_decl='NET_EXPORT_PRIVATE:' " +
          " " +
          "--include " +
          "$(location net/base/net_export.h) " +
@@ -3349,7 +3349,7 @@
          "--cc-out-dir " +
          "$(genDir) " +
          "--cc-options " +
-         "dllexport_decl=COMPONENT_EXPORT(QUICHE): " +
+         "dllexport_decl='COMPONENT_EXPORT(QUICHE):' " +
          " " +
          "--include " +
          "$(location base/component_export.h) " +
@@ -3387,7 +3387,7 @@
          "--cc-out-dir " +
          "$(genDir) " +
          "--cc-options " +
-         "dllexport_decl=COMPONENT_EXPORT(QUICHE): " +
+         "dllexport_decl='COMPONENT_EXPORT(QUICHE):' " +
          " " +
          "--include " +
          "$(location base/component_export.h) " +
@@ -3476,7 +3476,7 @@
          "--cc-out-dir " +
          "$(genDir) " +
          "--cc-options " +
-         "dllexport_decl=NET_EXPORT_PRIVATE: " +
+         "dllexport_decl='NET_EXPORT_PRIVATE:' " +
          " " +
          "--include " +
          "$(location net/base/net_export.h) " +
@@ -3508,7 +3508,7 @@
          "--cc-out-dir " +
          "$(genDir) " +
          "--cc-options " +
-         "dllexport_decl=NET_EXPORT_PRIVATE: " +
+         "dllexport_decl='NET_EXPORT_PRIVATE:' " +
          " " +
          "--include " +
          "$(location net/base/net_export.h) " +