Merge pull request atomvm#601 from pguyot/w21/fix-errno-usage

Fix a conflict in usage of errno

Allow including errno.h before port.h

These changes are made under both the "Apache 2.0" and the "GNU Lesser General
Public License 2.1 or later" license terms (dual license).

SPDX-License-Identifier: Apache-2.0 OR LGPL-2.1-or-later

Author: bettio

src/libAtomVM/port.h

@@ -37,7 +37,7 @@ term port_heap_create_tuple2(Heap *heap, term a, term b);
 term port_heap_create_tuple3(Heap *heap, term a, term b, term c);
 term port_heap_create_tuple_n(Heap *heap, size_t num_terms, term *terms);
 term port_heap_create_error_tuple(Heap *heap, term reason);
-term port_heap_create_sys_error_tuple(Heap *heap, term syscall, int errno);
+term port_heap_create_sys_error_tuple(Heap *heap, term syscall, int err);
 term port_heap_create_ok_tuple(Heap *heap, term t);
 term port_heap_create_reply(Heap *heap, term ref, term payload);
 
@@ -59,9 +59,9 @@ static inline term port_create_error_tuple(Context *ctx, term reason)
 {
     return port_heap_create_error_tuple(&ctx->heap, reason);
 }
-static inline term port_create_sys_error_tuple(Context *ctx, term syscall, int errno)
+static inline term port_create_sys_error_tuple(Context *ctx, term syscall, int err)
 {
-    return port_heap_create_sys_error_tuple(&ctx->heap, syscall, errno);
+    return port_heap_create_sys_error_tuple(&ctx->heap, syscall, err);
 }
 static inline term port_create_ok_tuple(Context *ctx, term t)
 {