process_collector: avoid a compiler warning on macOS (fixes #1660)

The header has a warning when included, with no way to shut it off, and no
alternative to obtain these symbols.  They're technically architecture specific
values, but they aren't different between amd64 and arm64, so combine the
definitions.

Signed-off-by: Matt Harbison <mharbison72@gmail.com>

Author: mharbison72

prometheus/process_collector_cgo_darwin.c

@@ -15,12 +15,16 @@
 
 #include <mach/mach_init.h>
 #include <mach/task.h>
-// Compiler warns that shared_memory_server.h is deprecated, use this instead.
-// But this doesn't define SHARED_DATA_REGION_SIZE or SHARED_TEXT_REGION_SIZE.
-//#include <mach/shared_region.h>
-#include <mach/shared_memory_server.h>
 #include <mach/mach_vm.h>
 
+// The compiler warns that mach/shared_memory_server.h is deprecated, and to use
+// mach/shared_region.h instead.  But that doesn't define
+// SHARED_DATA_REGION_SIZE or SHARED_TEXT_REGION_SIZE, so redefine them here and
+// avoid a warning message when running tests.
+#define GLOBAL_SHARED_TEXT_SEGMENT      0x90000000U
+#define SHARED_DATA_REGION_SIZE         0x10000000
+#define SHARED_TEXT_REGION_SIZE         0x10000000
+
 
 int get_memory_info(unsigned long long *rss, unsigned long long *vsize)
 {