Fix code coverage processing (#214)

Author: kmcbride

Tools/ci-spm.sh

@@ -7,9 +7,9 @@ source "$(dirname "$0")/helpers.sh"
 swift test --enable-code-coverage --sanitize=thread || fail "SPM Test Failed"
 
 # h4x to trick codecov
-for bundle in .build/x86_64-apple-macosx/debug/*.xctest ; do
+for bundle in .build/debug/*.xctest ; do
   parent="$(dirname "$bundle")"
   ln -sf "$PWD/$bundle" "${parent}/codecov"
 done
 
-process_coverage -D ".build/x86_64-apple-macosx/debug" -F "macspm"
+process_coverage -D ".build/debug/codecov" -F "macspm"