[openmp] [test] Use stdint.h instead of manual code defining kmp_int*. NFC.

openmp/runtime/test/tasking/bug_nested_proxy_task.c

 // RUN: %libomp-compile-and-run
 // The runtime currently does not get dependency information from GCC.
 // UNSUPPORTED: gcc
 
 // Very flaky on openmp-clang-x86_64-linux-debian.
 // https://bugs.llvm.org/show_bug.cgi?id=45397
 // UNSUPPORTED: linux
 
+#include <stdint.h>
 #include <stdio.h>
 #include <omp.h>
 #include "omp_testsuite.h"
 #include "omp_my_sleep.h"
 
 /*
  With task dependencies one can generate proxy tasks from an explicit task
  being executed by a serial task team. The OpenMP runtime library didn't
  expect that and tries to free the explicit task that is the parent of the
  proxy task still working in background. It therefore has incomplete children
  which triggers a debugging assertion.
 */
 
 // Compiler-generated code (emulation)
-#ifdef _WIN64
-typedef long long kmp_intptr_t;
-#else
-typedef long kmp_intptr_t;
-#endif
-typedef int kmp_int32;
-typedef unsigned char kmp_uint8;
+typedef intptr_t kmp_intptr_t;
+typedef int32_t kmp_int32;
+typedef uint8_t kmp_uint8;
 
 typedef char bool;
 
 typedef struct ident {
     kmp_int32 reserved_1;   /**<  might be used in Fortran; see above  */
     kmp_int32 flags;        /**<  also f.flags; KMP_IDENT_xxx flags; KMP_IDENT_KMPC identifies this union member  */
     kmp_int32 reserved_2;   /**<  not really used in Fortran any more; see above */
 #if USE_ITT_BUILD

openmp/runtime/test/tasking/bug_proxy_task_dep_waiting.c

 // RUN: %libomp-compile-and-run
 // The runtime currently does not get dependency information from GCC.
 // UNSUPPORTED: gcc
 
 // Very flaky on openmp-clang-x86_64-linux-debian.
 // https://bugs.llvm.org/show_bug.cgi?id=45397
 // UNSUPPORTED: linux
 
+#include <stdint.h>
 #include <stdio.h>
 #include <omp.h>
 #include "omp_testsuite.h"
 #include "omp_my_sleep.h"
 
 /*
  An explicit task can have a dependency on a target task. If it is not
  directly satisfied, the runtime should not wait but resume execution.
 */
 
 // Compiler-generated code (emulation)
-#ifdef _WIN64
-typedef long long kmp_intptr_t;
-#else
-typedef long kmp_intptr_t;
-#endif
-typedef int kmp_int32;
-typedef unsigned char kmp_uint8;
+typedef intptr_t kmp_intptr_t;
+typedef int32_t kmp_int32;
+typedef uint8_t kmp_uint8;
 
 typedef char bool;
 
 typedef struct ident {
     kmp_int32 reserved_1;   /**<  might be used in Fortran; see above  */
     kmp_int32 flags;        /**<  also f.flags; KMP_IDENT_xxx flags; KMP_IDENT_KMPC identifies this union member  */
     kmp_int32 reserved_2;   /**<  not really used in Fortran any more; see above */
 #if USE_ITT_BUILD