wasm: remove clamp mode for WASM_OBJECT_FILES builds

Change-Id: I2ddda7423c6546ab287111485da9c145ce7d31ea
Fixes: QTBUG-76771
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>

mkspecs/wasm-emscripten/qmake.conf

@@ -14,6 +14,8 @@ load(device_config)
     QMAKE_CFLAGS += -s WASM_OBJECT_FILES=$$WASM_OBJECT_FILES
     QMAKE_CXXFLAGS += -s WASM_OBJECT_FILES=$$WASM_OBJECT_FILES
     QMAKE_LFLAGS += -s WASM_OBJECT_FILES=$$WASM_OBJECT_FILES
+} else {
+    EMCC_COMMON_LFLAGS +=  -s \"BINARYEN_TRAP_MODE=\'clamp\'\"
 }
 
 EMTERP_FLAGS = \
@@ -29,8 +31,7 @@ EMCC_COMMON_LFLAGS = \
     -s USE_WEBGL2=1 \
     -s NO_EXIT_RUNTIME=0 \
     -s ERROR_ON_UNDEFINED_SYMBOLS=1 \
-    --bind \
-    -s \"BINARYEN_TRAP_MODE=\'clamp\'\"
+    --bind
 
 # The -s arguments can also be used with release builds,
 # but are here in debug for clarity.