Build Foundation and XCTest in release mode for Wasm (#4355)

Author: kateinoigakukun

utils/webassembly/build-foundation.sh

@@ -12,6 +12,7 @@ mkdir -p $FOUNDATION_BUILD
 cd $FOUNDATION_BUILD
 
 cmake -G Ninja \
+  -DCMAKE_BUILD_TYPE="Release" \
   -DCMAKE_SYSROOT="$WASI_SYSROOT_PATH" \
   -DCMAKE_Swift_COMPILER="$DESTINATION_TOOLCHAIN/usr/bin/swiftc" \
   -DCMAKE_STAGING_PREFIX="$DESTINATION_TOOLCHAIN/usr" \

utils/webassembly/build-xctest.sh

@@ -10,6 +10,7 @@ mkdir -p $BUILD_DIR
 cd $BUILD_DIR
 
 cmake -G Ninja \
+  -DCMAKE_BUILD_TYPE="Release" \
   -DCMAKE_SYSROOT="$WASI_SYSROOT_PATH" \
   -DCMAKE_Swift_COMPILER="$DESTINATION_TOOLCHAIN/usr/bin/swiftc" \
   -DCMAKE_STAGING_PREFIX="$DESTINATION_TOOLCHAIN/usr" \