devel/google-perftools: Add LD_32_PRELOAD to the valgrind detection code

Suggested by:	Paul Floyd <pjfloyd@wanadoo.fr>

devel/google-perftools/Makefile

@@ -3,7 +3,7 @@
 PORTNAME=	google-perftools
 DISTVERSIONPREFIX=	gperftools-
 DISTVERSION=	2.9.1
-PORTREVISION=	2
+PORTREVISION=	3
 CATEGORIES=	devel
 MASTER_SITES=	https://github.com/gperftools/gperftools/releases/download/gperftools-${PORTVERSION}/
 DISTNAME=	gperftools-${PORTVERSION}

devel/google-perftools/files/patch-src_base_dynamic__annotations.c

@@ -3,13 +3,15 @@
 
 --- src/base/dynamic_annotations.c.orig	2021-02-15 06:44:21 UTC
 +++ src/base/dynamic_annotations.c
-@@ -43,6 +43,19 @@
+@@ -43,6 +43,21 @@
  #include "base/dynamic_annotations.h"
  #include "getenv_safe.h" // for TCMallocGetenvSafe
  
 +static int running_on_valgrind_preload = -1;
 +void __attribute__ ((constructor)) premain() {
 +  char *LD_PRELOAD = getenv("LD_PRELOAD");
++  if (LD_PRELOAD == NULL)
++    LD_PRELOAD = getenv("LD_32_PRELOAD");
 +  running_on_valgrind_preload = LD_PRELOAD != NULL &&
 +    (
 +      strstr(LD_PRELOAD, "/valgrind/") != NULL
@@ -23,7 +25,7 @@
  static int GetRunningOnValgrind(void) {
  #ifdef RUNNING_ON_VALGRIND
    if (RUNNING_ON_VALGRIND) return 1;
-@@ -51,6 +64,11 @@ static int GetRunningOnValgrind(void) {
+@@ -51,6 +66,11 @@ static int GetRunningOnValgrind(void) {
    if (running_on_valgrind_str) {
      return strcmp(running_on_valgrind_str, "0") != 0;
    }