Fix some CMake definitions on OpenBSD (#125294)

* Need `sys/types.h` for `HAVE_STATFS_FSTYPENAME`. See
https://man.openbsd.org/statfs (missed a couple of places in #124992).
* Need `sys/types.h` for `HAVE_MNTINFO`. See:
https://man.openbsd.org/getmntinfo
* Need `sys/types.h` and `sys/socket.h` for `HAVE_GETPEEREID`. See:
https://man.openbsd.org/getpeereid

Contributes to #124911.

Co-authored-by: Jan Kotas <jkotas@microsoft.com>

Author: sethjackson

src/coreclr/gc/unix/configure.cmake

@@ -148,7 +148,7 @@ int main(int argc, char **argv)
 check_struct_has_member(
     "struct statfs"
     f_fstypename
-    "sys/mount.h"
+    "sys/types.h;sys/mount.h"
     HAVE_STATFS_FSTYPENAME)
 
 check_struct_has_member(

src/coreclr/pal/src/configure.cmake

@@ -630,7 +630,7 @@ endif(CLR_CMAKE_TARGET_APPLE)
 check_struct_has_member(
     "struct statfs"
     f_fstypename
-    "sys/mount.h"
+    "sys/types.h;sys/mount.h"
     HAVE_STATFS_FSTYPENAME)
 
 check_struct_has_member(

src/native/libs/configure.cmake

@@ -203,7 +203,7 @@ check_symbol_exists(
 
 check_symbol_exists(
     getmntinfo
-    sys/mount.h
+    "sys/types.h;sys/mount.h"
     HAVE_MNTINFO)
 
 check_symbol_exists(
@@ -974,7 +974,7 @@ check_include_files(
 
 check_symbol_exists(
     getpeereid
-    unistd.h
+    "unistd.h;sys/types.h;sys/socket.h"
     HAVE_GETPEEREID)
 
 check_symbol_exists(