crt: Don't provide the getpid == _getpid alias for arm

There's no _getpid function on arm.

Signed-off-by: Martin Storsjö <martin@martin.st>
diff --git a/mingw-w64-crt/def-include/msvcrt-common.def.in b/mingw-w64-crt/def-include/msvcrt-common.def.in
index a98f8a1..bdc5f25 100644
--- a/mingw-w64-crt/def-include/msvcrt-common.def.in
+++ b/mingw-w64-crt/def-include/msvcrt-common.def.in
@@ -1,3 +1,5 @@
+#include "func.def.in"
+
 #define ADD_UNDERSCORE(symbol) symbol == _ ## symbol
 #define ADD_DOUBLE_UNDERSCORE(symbol) symbol == __ ## symbol
 
@@ -44,7 +46,7 @@
 ADD_UNDERSCORE(getch)
 ADD_UNDERSCORE(getche)
 ADD_UNDERSCORE(getcwd)
-ADD_UNDERSCORE(getpid)
+F_X86_ANY(ADD_UNDERSCORE(getpid))
 ADD_UNDERSCORE(getw)
 ADD_UNDERSCORE(heapwalk)
 ADD_UNDERSCORE(isatty)