libGL: request stack size on newer musl systems

since 1.1.21 musl supports reading the minimal stack size from the
PT_GNU_STACK elf header[1].

[1] https://git.musl-libc.org/cgit/musl/commit/?id=7b3348a98c139b4b4238384e52d4b0eb237e4833

srcpkgs/libGL/patches/musl-stacksize.patch

@@ -1,35 +0,0 @@
-diff --git ./include/c11/threads_posix.h ./include/c11/threads_posix.h
-index 45cb6075e6..1a2ea1a450 100644
---- ./include/c11/threads_posix.h
-+++ ./include/c11/threads_posix.h
-@@ -281,15 +281,29 @@ static inline int
- thrd_create(thrd_t *thr, thrd_start_t func, void *arg)
- {
-     struct impl_thrd_param *pack;
-+#ifdef __GLIBC__
-+    pthread_attr_t *attrp = NULL;
-+#else
-+    pthread_attr_t attr = { 0 };
-+    pthread_attr_init(&attr);
-+    pthread_attr_setstacksize(&attr, 8388608);
-+    pthread_attr_t *attrp = &attr;
-+#endif
-     assert(thr != NULL);
-     pack = (struct impl_thrd_param *)malloc(sizeof(struct impl_thrd_param));
-     if (!pack) return thrd_nomem;
-     pack->func = func;
-     pack->arg = arg;
--    if (pthread_create(thr, NULL, impl_thrd_routine, pack) != 0) {
-+    if (pthread_create(thr, attrp, impl_thrd_routine, pack) != 0) {
-+#ifndef __GLIBC__
-+        pthread_attr_destroy(&attr);
-+#endif
-         free(pack);
-         return thrd_error;
-     }
-+#ifndef __GLIBC__
-+    pthread_attr_destroy(&attr);
-+#endif
-     return thrd_success;
- }
- 

srcpkgs/libGL/template

@@ -1,7 +1,7 @@
 # Template file for 'libGL'
 pkgname=libGL
 version=18.3.2
-revision=1
+revision=2
 wrksrc="mesa-${version}"
 build_style=meson
 configure_args="-Dshared-glapi=true -Dgbm=true -Degl=true
@@ -22,6 +22,7 @@ homepage="https://www.mesa3d.org/"
 changelog="https://www.mesa3d.org/relnotes/${version}.html"
 distfiles="https://mesa.freedesktop.org/archive/mesa-${version}.tar.xz"
 checksum=f7ce7181c07b6d8e0132da879af1729523a6c8aa87f79a9d59dfd064024cfb35
+LDFLAGS+=" -Wl,-z,stack-size=2097152"
 
 # Set subpackages manually to set proper rdeps in 32bit pkgs.
 subpackages="libglapi libgbm libEGL libGLES libOSMesa"