Update target specs

thumbv6m-linux-eabi.json

@@ -23,5 +23,6 @@
     "relocation-model": "static",
     "target-endian": "little",
     "target-pointer-width": "32",
+    "target-c-int-width": "32",
     "vendor": ""
 }

thumbv7em-linux-eabi.json

@@ -22,5 +22,6 @@
     "relocation-model": "static",
     "target-endian": "little",
     "target-pointer-width": "32",
+    "target-c-int-width": "32",
     "vendor": ""
 }

thumbv7em-linux-eabihf.json

@@ -23,5 +23,6 @@
     "relocation-model": "static",
     "target-endian": "little",
     "target-pointer-width": "32",
+    "target-c-int-width": "32",
     "vendor": ""
 }

thumbv7m-linux-eabi.json

@@ -22,5 +22,6 @@
     "relocation-model": "static",
     "target-endian": "little",
     "target-pointer-width": "32",
+    "target-c-int-width": "32",
     "vendor": ""
 }