[WASM] Use release build to reduce artifact size

Author: kateinoigakukun

.github/workflows/main.yml

@@ -43,7 +43,7 @@ jobs:
         tar xf icu.tar.xz
 
         cd swift
-        utils/build-script --debug --wasm --verbose \
+        utils/build-script --release --wasm --verbose \
           --skip-build-benchmarks \
           --extra-cmake-options=" \
             -DSWIFT_PRIMARY_VARIANT_SDK:STRING=WASM \
@@ -89,7 +89,7 @@ jobs:
         wget -O icu.tar.xz "https://github.com/swiftwasm/icu4c-wasi/releases/download/20190421.3/icu4c-wasi.tar.xz"
         tar xf icu.tar.xz
         cd swift
-        ./utils/build-script --debug --wasm \
+        ./utils/build-script --release --wasm \
           --skip-build-benchmarks \
           --extra-cmake-options=" \
             -DSWIFT_PRIMARY_VARIANT_SDK:STRING=WASM \