fix target-pointer-width in tests

Author: WaffleLapkin

compiler-builtins/etc/thumbv7em-none-eabi-renamed.json

@@ -19,5 +19,5 @@
   },
   "panic-strategy": "abort",
   "relocation-model": "static",
-  "target-pointer-width": "32"
+  "target-pointer-width": 32
 }