test/embedded/dependencies-random: use sed instead of ex

Author: MaxDesiatov

test/embedded/dependencies-random.swift

@@ -7,7 +7,7 @@
 // RUN: if [ %target-os == "linux-gnu" ] || [[ %target-os =~ "wasi" ]]; then sed -E -i -e 's/^_(.*)$/\1/' %t/allowed-dependencies.txt; fi
 
 // Wasm has additional dependencies
-// RUN: if [[ %target-os =~ "wasi" ]]; then ex -sc '3i|__stack_pointer' -sc '1i|__memory_base' -sc '1i|__indirect_function_table' -cx %t/allowed-dependencies.txt; fi
+// RUN: if [[ %target-os =~ "wasi" ]]; then sed -i '' -e '3 i\'$'\n''__stack_pointer' -e '1 i\'$'\n''__indirect_function_table' -e '1 i\'$'\n''__memory_base' %t/allowed-dependencies.txt; fi
 
 // RUN: %llvm-nm --undefined-only --format=just-symbols %t/a.o | sort | tee %t/actual-dependencies.txt