Fix codesigning: reenable extension provisioning profile

The macOS PR that was merged accidentally dropped a cmake option that
result in the extension's provisioning profile not getting copied into
place (but was working locally because I was using a build dir where the
variable was still set).  This restores the option to fix the
codesigning.

cmake/macos.cmake

@@ -14,6 +14,8 @@ if(MACOS_SYSTEM_EXTENSION)
 endif()
 set(CODESIGN_PROFILE "${PROJECT_SOURCE_DIR}/contrib/macos/lokinet.${default_profile_type}.provisionprofile" CACHE FILEPATH
   "Path to a .provisionprofile to use for the main app")
+set(CODESIGN_EXT_PROFILE "${PROJECT_SOURCE_DIR}/contrib/macos/lokinet-extension.${default_profile_type}.provisionprofile" CACHE FILEPATH
+  "Path to a .provisionprofile to use for the lokinet extension")
 
 if(CODESIGN AND NOT CODESIGN_ID)
   if(MACOS_SYSTEM_EXTENSION)
@@ -59,13 +61,15 @@ else()
 endif()
 
 
-if(NOT CODESIGN_PROFILE)
-  message(WARNING "Missing a CODESIGN_PROFILE provisioning profile: Apple will most likely log an uninformative error message to the system log and then kill harmless kittens if you try to run the result")
-endif()
-if(NOT EXISTS "${CODESIGN_PROFILE}")
-  message(FATAL_ERROR "Provisioning profile ${CODESIGN_PROFILE} does not exist; fix your -DCODESIGN_PROFILE path")
-endif()
-message(STATUS "Using ${CODESIGN_PROFILE} provisioning profile")
+foreach(prof IN ITEMS CODESIGN_PROFILE CODESIGN_EXT_PROFILE)
+  if(NOT ${prof})
+    message(WARNING "Missing a ${prof} provisioning profile: Apple will most likely log an uninformative error message to the system log and then kill harmless kittens if you try to run the result")
+  elseif(NOT EXISTS "${${prof}}")
+    message(FATAL_ERROR "Provisioning profile ${${prof}} does not exist; fix your -D${prof} path")
+  endif()
+endforeach()
+message(STATUS "Using ${CODESIGN_PROFILE} app provisioning profile")
+message(STATUS "Using ${CODESIGN_EXT_PROFILE} extension provisioning profile")