mesa: Revert hack for `libandroid-shmem`

which is no longer necessary after `libandroid-shmem` update.

Effectively reverts commit 671b39bc2c.

%ci:no-build

x11-packages/mesa/build.sh

@@ -4,7 +4,7 @@ TERMUX_PKG_LICENSE="MIT"
 TERMUX_PKG_LICENSE_FILE="docs/license.rst"
 TERMUX_PKG_MAINTAINER="@termux"
 TERMUX_PKG_VERSION=21.3.7
-TERMUX_PKG_REVISION=2
+TERMUX_PKG_REVISION=3
 TERMUX_PKG_SRCURL=https://archive.mesa3d.org/mesa-${TERMUX_PKG_VERSION}.tar.xz
 TERMUX_PKG_SHA256=b4fa9db7aa61bf209ef0b40bef83080999d86ad98df8b8b4fada7c128a1efc3d
 TERMUX_PKG_DEPENDS="libandroid-shmem, libc++, libx11, libxext, zlib, libexpat"
@@ -28,7 +28,7 @@ TERMUX_PKG_EXTRA_CONFIGURE_ARGS="
 
 termux_step_pre_configure() {
 	CPPFLAGS+=" -D__USE_GNU"
-	# Note: -landroid-shmem in LDFLAGS is not needed because it is dlopen()ed
+	LDFLAGS+=" -landroid-shmem"
 }
 
 termux_step_post_massage() {

x11-packages/mesa/src-mesa-drivers-x11-xm_buffer.c.patch

@@ -1,84 +0,0 @@
---- a/src/mesa/drivers/x11/xm_buffer.c
-+++ b/src/mesa/drivers/x11/xm_buffer.c
-@@ -45,6 +45,81 @@
- #if defined(USE_XSHM)
- static volatile int mesaXErrorFlag = 0;
- 
-+#ifdef __ANDROID__
-+
-+#include <dlfcn.h>
-+
-+typedef int (*shmctl_func_t)(int, int, struct shmid_ds *);
-+typedef int (*shmget_func_t)(key_t, size_t, int);
-+typedef void *(*shmat_func_t)(int, void const *, int);
-+typedef int (*shmdt_func_t)(void const *);
-+static shmctl_func_t shmctl_func;
-+static shmget_func_t shmget_func;
-+static shmat_func_t shmat_func;
-+static shmdt_func_t shmdt_func;
-+#undef shmctl
-+#undef shmget
-+#undef shmat
-+#undef shmdt
-+static int libandroid_shmem_funcs_initialized;
-+
-+static void
-+libandroid_shmem_initialize(void)
-+{
-+   if (!libandroid_shmem_funcs_initialized) {
-+      void *libandroid_shmem_handle = dlopen("libandroid-shmem.so", RTLD_NOW);
-+      if (libandroid_shmem_handle != NULL) {
-+         shmctl_func = dlsym(libandroid_shmem_handle, "shmctl");
-+         shmget_func = dlsym(libandroid_shmem_handle, "shmget");
-+         shmat_func = dlsym(libandroid_shmem_handle, "shmat");
-+         shmdt_func = dlsym(libandroid_shmem_handle, "shmdt");
-+      }
-+      libandroid_shmem_funcs_initialized = 1;
-+   }
-+}
-+
-+#pragma GCC visibility push(hidden)
-+
-+int
-+shmctl(int shmid, int cmd, struct shmid_ds *buf)
-+{
-+   if (!libandroid_shmem_funcs_initialized) {
-+      libandroid_shmem_initialize();
-+   }
-+   return shmctl_func(shmid, cmd, buf);
-+}
-+
-+int
-+shmget(key_t key, size_t size, int shmflg)
-+{
-+   if (!libandroid_shmem_funcs_initialized) {
-+      libandroid_shmem_initialize();
-+   }
-+   return shmget_func(key, size, shmflg);
-+}
-+
-+void *
-+shmat(int shmid, void const *shmaddr, int shmflg)
-+{
-+   if (!libandroid_shmem_funcs_initialized) {
-+      libandroid_shmem_initialize();
-+   }
-+   return shmat_func(shmid, shmaddr, shmflg);
-+}
-+
-+int
-+shmdt(void const *shmaddr)
-+{
-+   if (!libandroid_shmem_funcs_initialized) {
-+      libandroid_shmem_initialize();
-+   }
-+   return shmdt_func(shmaddr);
-+}
-+
-+#pragma GCC visibility pop
-+
-+#endif /* __ANDROID__ */
-+
- /**
-  * Catches potential Xlib errors.
-  */