epoxy: 1.5.1 -> 1.5.2 (#47178)

libgl-path.patch was updated (it applied with little fuzz, because I am
a bit lazy, and rebase it on master of epoxy, not 1.5.2)

pkgs/development/libraries/epoxy/default.nix

@@ -6,13 +6,13 @@ with stdenv.lib;
 
 stdenv.mkDerivation rec {
   name = "epoxy-${version}";
-  version = "1.5.1";
+  version = "1.5.2";
 
   src = fetchFromGitHub {
     owner = "anholt";
     repo = "libepoxy";
     rev = "${version}";
-    sha256 = "1811agxr7g9wd832np8sw152j468kg3qydmfkc564v54ncfcgaci";
+    sha256 = "0frs42s7d3ff2wlw0jns6vb3myx2bhz9m5nkzbnfyn436s2qqls3";
   };
 
   outputs = [ "out" "dev" ];

pkgs/development/libraries/epoxy/libgl-path.patch

@@ -1,20 +1,11 @@
-From 4046e0ac8ed93354c01de5f3b5cae790cce70404 Mon Sep 17 00:00:00 2001
-From: Will Dietz <w@wdtz.org>
-Date: Thu, 29 Mar 2018 07:21:02 -0500
-Subject: [PATCH] Explicitly search LIBGL_PATH as fallback, if defined.
-
----
- src/dispatch_common.c | 12 ++++++++++++
- 1 file changed, 12 insertions(+)
-
 diff --git a/src/dispatch_common.c b/src/dispatch_common.c
-index bc2fb94..776237b 100644
+index b3e4f5f..303e8f5 100644
 --- a/src/dispatch_common.c
 +++ b/src/dispatch_common.c
-@@ -306,6 +306,18 @@ get_dlopen_handle(void **handle, const char *lib_name, bool exit_on_fail)
-     pthread_mutex_lock(&api.mutex);
-     if (!*handle) {
-         *handle = dlopen(lib_name, RTLD_LAZY | RTLD_LOCAL);
+@@ -310,6 +310,19 @@ get_dlopen_handle(void **handle, const char *lib_name, bool exit_on_fail, bool l
+             flags |= RTLD_NOLOAD;
+ 
+         *handle = dlopen(lib_name, flags);
 +#ifdef LIBGL_PATH
 +        if (!*handle) {
 +          char pathbuf[sizeof(LIBGL_PATH) + 1 + 1024 + 1];
@@ -24,12 +15,10 @@ index bc2fb94..776237b 100644
 +            fprintf(stderr, "Error prefixing library pathname\n");
 +            exit(1);
 +          }
-+          *handle = dlopen(pathbuf, RTLD_LAZY | RTLD_LOCAL);
++          *handle = dlopen(pathbuf, flags);
 +        }
 +#endif
++
          if (!*handle) {
              if (exit_on_fail) {
                  fprintf(stderr, "Couldn't open %s: %s\n", lib_name, dlerror());
--- 
-2.16.3
-