external/firebird: Implicit int in configure check

...so that with Clang 15 trunk after
<https://github.com/llvm/llvm-project/commit/2cb2cd242ca08d0bbd2a51a41f1317442e5414fc>
"Change the behavior of implicit int diagnostics" the check now failed to
compile with

> configure:21471: checking alignment of long
[...]
> conftest.c:166:2: error: type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]

with consequences the same as in f6be6cd82b
"external/firebird: Missing include in configure check" (so rename the existing
configure-include.patch, as it now covers various kinds of C99 violations)

Change-Id: I64e7c13945a3ede3900cc6a84da575e35bdce953
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/133994
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

external/firebird/UnpackedTarball_firebird.mk

@@ -49,7 +49,7 @@ $(eval $(call gb_UnpackedTarball_add_patches,firebird,\
     external/firebird/msvc.patch \
     external/firebird/wnt-per-process-trace-storage.patch.1 \
     external/firebird/0001-extern-cloop-Missing-dependencies-of-compilations-on.patch.1 \
-    external/firebird/configure-include.patch \
+    external/firebird/configure-c99.patch \
 ))
 
 ifeq ($(OS),WNT)

external/firebird/configure-c99.patch

@@ -1,18 +1,23 @@
 --- configure
 +++ configure
-@@ -21478,6 +21478,7 @@
+@@ -21478,8 +21478,9 @@
  else
    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
  /* end confdefs.h.  */
 +#include <stdlib.h>
  #include <semaphore.h>
- main () {
+-main () {
++int main () {
    struct s {
-@@ -21514,6 +21515,7 @@
+     char a;
+     union { long long x; sem_t y; } b;
+@@ -21514,7 +21515,8 @@
  else
    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
  /* end confdefs.h.  */
+-main () {
 +#include <stdlib.h>
- main () {
++int main () {
    struct s {
      char a;
+     double b;

external/firebird/firebird-cygwin-msvc.patch

@@ -34,7 +34,7 @@
  /* end confdefs.h.  */
  #include <stdlib.h>
 -#include <semaphore.h>
- main () {
+ int main () {
    struct s {
      char a;
 -    union { long long x; sem_t y; } b;